Dogs That Changed the World
Selective Breeding Problems

Selective Breeding Problems

In the same way that inbreeding among human populations can increase the frequency of normally rare genes that cause diseases, the selective breeding that created the hundreds of modern dog breeds has put purebred dogs at risk for a large number of health problems, affecting both body and behavior.

Some conditions are directly related to the features breeders have sought to perpetuate among their dogs. As they deliberately manipulated the appearance of dogs to create or accentuate physical characteristics that were considered aesthetically pleasing, like the flat face of a bulldog or low-slung eyelids of a Bloodhound, breeders also created physical disabilities. The excessively wrinkled skin of the Chinese Shar-Pei causes frequent skin infection; Bulldogs and other flat-faced (or brachycephalic) breeds such as the Pekingese have breathing problems because of their set-back noses and shortened air passages; Bloodhounds suffer chronic eye irritation and infection.

The unnaturally large and small sizes of other breeds encourage different problems. For example, toy and miniature breeds often suffer from dislocating kneecaps and heart problems are more common among small dogs. Giant dogs such as Mastiffs, Saint Bernards, and Great Danes are nearly too big for their own good. Researchers have found a striking correlation between a dog’s large size and a frequency of orthopedic problems like hip dysplasia. Large dogs are often prone to heat prostration because they can’t cool down their bodies (tiny dogs, by contrast, have a hard time staying warm), and because of the massive weight they must support, these breeds are prone to malignant bone tumors in their legs. Meanwhile, the huge head and narrow hips of the Bulldog can necessitate that their pups must be born by Caesarean section.

Other health problems among purebreds are the product of both inbreeding and bad genetic luck. The genes responsible for many genetic diseases are “recessive,” which means that two copies of a damaged gene, one from the mother and one from the father, must be present in an individual for the disease to occur. Individuals that carry only one copy of the disease gene don’t have the condition, and are carriers of the disease. Normally, because disease genes are relatively rare, it is unlikely that both the mother and the father will be carriers, and even less likely that they’ll both give the disease gene to their offspring. But that’s not the case for purebred dog breeds, where genetically similar individuals are intentionally mated, increasing the concentration of disease genes. It’s like stacking a deck of cards with ten extra aces and ten extra face cards; the loaded deck increases your chance of hitting blackjack in a game of 21-but what you “win” might be allergies or a predisposition to cancer.

Bloodhound   

Bloodhounds suffer chronic eye irritation and infection.

Skin problems

A skin allergy, atopic dermatitis, inflicts itchy, inflamed skin on as many as 15 percent of all dogs, but certain breeds are particularly susceptible. Dog breeds prone to atopic dermatitis include Dalmatians, Vizslas, and several terriers, such as the Boston Terrier, Bull Terrier, and the West Highland White Terrier. The numerous skin folds of a Chinese Shar-Pei, so valued by some breeders, can become breeding grounds for staphylococcus and other bacteria, which cause frequent skin infections. Also, excess wrinkles of skin on the face can rub on the eye, causing lesions and, potentially, blindness.

Immune system disease

In autoimmune disorders, an individual’s immune system, which normally works to fight off foreign invaders, launches a misguided attack against its own tissues and cells. A number of inherited diseases compromising the immune system have been noted in dogs, including primary severe combined immunodeficiency (a dog version of the “bubble boy” disease) among Basset hounds, Cardigan Welsh Corgis, and Dachshunds. Addison’s disease, an autoimmune disease that affects the hormone-producing adrenal glands, occurs more frequently among several particular breeds, including the Bearded Collie, Portuguese Water Dog, and Standard Poodles. Diabetes mellitus, an autoimmune disorder affecting the body’s response to sugars, shows up more frequently among Samoyeds and Australian Terrier dogs.

Blood disorders

Bassett Hounds are prone to an inherited abnormality the effects the ability of the platelets in the blood to clump together after an injury. The blood doesn’t clot properly, leading to hemorrhage and bruising. Clotting problems also plague dogs with von Willebrand’s disease, a genetic condition frequent in Doberman Pinschers.

Neurological, behavioral, and sensory

Neurological and behavioral problems afflict many pure breeds. Bull Terriers, for example, often compulsively chase their tails. Pugs are be predisposed to Pug Dog encephalitis, a fatal brain disease. Scottish Terriers are affected by Scottie Cramp, a disorder that causes the dogs to lose muscle control when they get excited. German Shepherds may inherit degenerative myelopathy, a crippling spinal cord disease that causes weakness and eventually paralysis.

Hearing and vision

Hereditary hearing loss is common in Dalmatians, Australian Cattle Dogs, and English Setters. Alaskan Malamutes, Siberian Huskies, Samoyeds, Bichon Frise, and more than 60 other purebred dogs suffer from inherited forms of cataracts, while progressive retinal atrophy, a common cause of blindness in purebreds, is particularly a problem in Old English Sheepdogs and Papillons.

Heart disease

Sudden death from cardiac disease is recurrent in several dog breeds, including Doberman Pinschers, Great Danes, Irish Wolfhounds, and German Shepherds. Boxers can be genetically predisposed to an irregular heartbeat. High blood pressure afflicts many small breeds including Poodles, Cocker Spaniels, Staffordshire terriers, among others.

Other organs and systems

Low thyroid function crops up most frequently in Alaskan Malamutes, English Setters, Golden Retrievers, Keeshonds, Samoyeds, and Siberian Huskies. Gastric torsion, or bloat, a potentially life-threatening inability to expel gas from the digestive system, is common among deep-chested breeds such as the Great Dane, Doberman, and German Shepherd. An inherited form of kidney disease affects English Cocker Spaniels, while Dalmatians are prone to kidney stones and Basenjis suffer from Fanconi Syndrome, a potentially fatal inherited disease in which the kidneys fail to reabsorb nutrients. Liver damage and cirrhosis are common in Bedlington Terriers because of an inherited condition called copper toxicosis, in which high levels of copper accumulate in the liver.

Cancer

Cancers are strongly influenced by genetics, and so it is not surprising to find various types of cancer among different dog breeds. For example, bone cancer, or osteosarcoma, is considerably more frequent among large and giant breeds of dogs, such as the Irish Wolfhound, Great Dane, Rottweiler, Labrador and Golden Retriever, Greyhound, and Saint Bernard, because their bones are stressed by carrying so much weight. High rates of malignant blood vessel tumors are seen among Golden Retrievers, which are also prone to leukemia and brain tumors. German Shepherd Dogs and Chow Chows are predisposed to gastric cancer, while Scottish Terriers are 18 times more likely to develop bladder cancer than are other breeds.

Orthopedic

Hip dysplasia, in which looseness in the hip joint causes excessive wear that eventually leads to arthritis, is most common among large dogs, especially those like the German Shepherd Dog and the Saint Bernard which have heavy, broad hips. The long neck and large head of breeds such as the Great Dane and the Doberman can cause the compression of the spinal cord in neck vertebrae, leading to wobbling and falling (”wobbler syndrome”). Selective breeding of the disproportionately short legs of breeds such as the Basset Hound and the Dachshund has led to bowed legs and chronic problems with elbow dislocation; the short legs and long back of Dachshunds causes them to suffer more often from ruptured vertebral disks. Because of their small bones, toy and miniature breeds are more likely to experience patellar luxation, the slipping or dislocation of the kneecaps.

  • Emily

    I thought that this was a very helpful article. It will help me with my dog!

  • Marion King

    This article will help me to give better care to my dog and understand what signs to look for to maintain approproate medical care for him.

  • Natalie Jenne

    I enjoyed the program on WTTW, Chicago. I have a mixed breed, and I think that’s what makes him so healthy..a combination of genes.

  • Barbara

    This article reinforces my belief that the best dogs in terms of health and temperament are good ol’ mixed breed mutts! There are lots of these wonderful mixed breed pooches at your local shelters. Give one a chance!

  • Robbie

    I loved this show series it was very insightful and answered a lot of questions I had. I’m going to buy it!

  • Sophie

    This Is AWSOME! it really helped me with my work

  • bex

    i love the show

  • Brawn

    I have a mix dog does that mean i put 2 dogs in danger

  • x_;;::C_a_M_i_::;;_X

    Well this helped my work…so yeah…

  • Brittany

    i love Bichon Frise’s and black labs and also i love rotts therer amazing

  • Lauren

    i love dogs

  • zuri

    Dogs are so cute

  • Fred

    There are no fewer instances of these issues in mutts than in purebred dogs. For example hip dysplasia and elbow dysplasia are actually more common in mixed breeds.

    Good breeders health test for everything and spend over a thousand dollars per dog doing so. Healthy dogs have healthy pups PERIOD

  • losser

    i hate dogs :-(

  • Skylla

    I enjoyed reading this article. I used it to help with my IB paper for biolody on selective breeding.
    Gracias MUCHO!

  • Clara

    i found this website rather annoying and blabbered a bit about nothing i needed, anyone got any better websites?

  • asfddftrtyutkjghjkyg

    what is this website going on about!!!!!!! i cant understand what it’s saying!!!

  • cat

    bloodhounds are gross

  • that dog in the picture

    In the same way that inbreeding among human populations can increase the frequency of normally rare genes that cause diseases, the selective breeding that created the hundreds of modern dog breeds has put purebred dogs at risk for a large number of health problems, affecting both body and behavio

  • Andrew

    RE: Fred’s Comment
    “Good breeders health test for everything and spend over a thousand dollars per dog doing so. Healthy dogs have healthy pups PERIOD.”

    There is no health test (yet) for a genetic predisposition for a condition caused by the onset of old age. Just like in humans, certain breeds/races are predisposed to certain disorders.

  • emma

    This was very helpful =]

  • Timmyfan

    I hate cats. Every time we’ve had a cat all I ever wanted to do was stay away from it. And I’d get pissed if it was near me. LOL!
    My favorite dogs are chihuahuas and australian shepherds, but I have a lot of favorite breeds. I’m aware of the dogs in shelters now, but I am just not a mixed-breeds kind of person. I’d help with rescuing them, but let those who love large, mixed dogs adopt them. I’ll work with purebreed rescues and stuff like that.

  • Tessa

    I am a breeder of GRs & I breed quality dogs that have won titles both in shows & in dog sports like OB, Agility, Flyball & Canine Freestyle. Both Dam & Sire have health clearances & we make sure both of their ancestors have been clear of any health problems, 4 generations down the line. We breed to improve the breed, not just breed to make quick bucks. A quality, well bred, sound dog will unlikely to have serious health problems like mutts & lousy bred Pedigrees.

  • Sarah

    Fred, I completely agree!
    Yes, some “breeders” don’t health test or breed unrelated dogs, and are breeding solely for money. Then there are the good breeders, the ones who do every health test (like hip scoring for potential hip dyplasia), only breed the best dogs, show/compete to prove the quality of their dogs, and then sell these fantastic well-bred puppies on spay/neuter contracts, into families who are guaranteed a well-bred puppy.
    I HATE articles like this! They make all purebreds out to be disease riddled and inbred, but they’re not!
    Mutts are just as likely to inherit crappy genes. In fact, if only responsible breeders bred purebreds (the only dogs which should be intentionally bred) then mutts would be less healthy.
    A well-bred purebred from a responsible breeder you know has the best genes, the best breeding, and the best start in life.

  • boo

    i believe this site and i believe that in 20 years quality purebreds will be a thing in the past..there will only be mixed breed that’s why DS breeds are more popular than purebreds now they are going to take over in the breeding industry…

  • Chris

    I dont condone strict inbreeding, but *safe* close breeding in dogs is a whole different arena than in humans because dogs have 39 pairs of chromosomes, humans only have 23. Dogs have almost double the number we have. I agree with Bob wholeheartedly. Reputable breeders watch health closely and try to improve poor health conditions in a breed. In fact most all breed clubs REQUIRE their breeders to track health issues and promote improving problems by requiring breeders to only breed to a strict code-of-ethics. This article is so one-sided its a shame.

  • Jessica

    I don’t believe purebred dogs will ever be a thing of the past. There are so many breeders out there that screen there dogs for health tests and improve them generation by generation. Purebreds can be and usually are a whole lot healthier then mutts.

  • shell

    very insightfull, i am now converting to hinduism thanks to this information. i am a woman in her 60’s who, after being divorced 7 times i have been looking for something to committ to for years!! thanks x x x x praise the Elephant guy!!

  • Bug

    Very interesting, but doesn’t go into much genetic detail.

  • ichigo

    i thought it was sad…. :( but the dogs are really cute ;D

  • SUPERDEEDUPER!!!

    THIS WAS SOO SAD ALL THESE POOR WITTLE PUPPIES HAVE ALL DEES DISEASES! !

  • person#23

    this helped me out with my science work!!!!!!! THANK YOU :D

  • Ryan

    This article will help me to give better care to my dog and understand what signs to look for to maintain approproate medical care for him.

  • Carl Zhang

    I think that the people who are breeding these dogs are mean because most of these dogs that have a genetic disorder might/will die quickly so if I were the person breeding these dogs I would try to help them instead by breeding superior dogs whose lives would be easier.

  • Royals 2

    I think that the people that do this are very mean. Its pro for more dogs but it is con- that they are making them suffer more.

  • Grant Carter

    I think that there is a lot of pros and cons of selective breeding. One con is that it puts the pure bread dog in danger which would not be good. A pro is that it will give a more varitiy of dogs. selective breeding with dog can cause a lot of problems to the off spring like skin problems. It would also make most of the dogs die faster because of gentic disorders. some dogs can be blind from to many wrinkles on there skin. this article shows that a lot of things are not as people would think they are like the fact that larger dogs have more of a chance of having cancer than small ones. This article tought me a lot about what can happen with selective breeding.

  • PEACE ON EARTH

    this article, well I had to write somthing for it for school and It told me a ton of things I needed to know for science

  • Saeed

    i thought this article was very helpful for people who have dogs or for scientists who are studying selective breeding. it is a very informative article and it helps people understand that selective breeding can be awful.

  • Cat

    I had a dog that we had to put down and he was a purebred. He had cancer and heart disease. I loved him a lot and he was a Bernese Mountain dog. The dog I have now which is the same breed has low thyroid and his grandmother had hip displaysia.

  • A

    sad

  • Gracie S.

    i think that a con would be that the dogs are in danger of dying and that isnt good. But there are a lot of varietys of dogs.

  • alexis

    y comment that u hate dogs or found the site annoying?? just get off it! which its already helped me alot and im only on the 2nd paragraph

  • i am the best

    what i sthe point in everyone writing their stupid thoughts NO ONE CARES

  • Wyntrcrew

    As a long time employee at a veterinary clinic, I have seen just as many or even more unhealthy mixed breed dogs as purebred, so the belief they are healthier is a myth. In purebred dogs it is just easier to predict specific problems due to their smaller gene pools. Mixed breeds also exhibit a much larger variety of health issues than is typically seen in purebred dogs.

    In Padgett’s book, “Control of Canine Genetic Disease”, there is a list of dog breeds, including mixed and their identified problems. Mixed breeds top the list for number of problems with at least 220. The next highest on the list is poodles which have 145 problems and cockers 116. Still a high number, but still far fewer than mixed breeds. A great many mixes include crosses to poodles with one or more other breeds, so the risk for something going wrong in dogs with this sort of pedigree is even higher. More often than not, there’s no health testing or pedigree history and no breeder to consult, so mixed breeds may suffer longer or have to go through much more expensive testing to correctly identify their problem before they get adequate treatment

    In spite of all the negative hype, inbreeding is only a problem when breeders fail to health test their dogs, research pedigrees and share important health information with one another. A truly ethical breeder is committed to their breed, is willing to openly discuss health issues in their breed and does all they can to provide healthy canine companions not only for the show ring, but as loving family companions.

    One more note. The article talks about severe combined immunodeficiency (SCID) in some breeds, but fails to mention that this problem has actually been eliminated in cardigan welsh corgis through the develoment of a DNA test and responsible breeding. PRA has also been nearly completely eliminated in cardigans through the same method and the newly available DNA test for DM (degenerative myelopathy, also known as ALS or Lou Gehrig’s disease in humans) will provide many responsible breeders with the means to eliminate this debilitating problem from their dogs over time.
    Further, the research on these and other disorders, funded through organizations such as The Canine Health Fund will not only help dogs, but will also help to provide benefits for humans with similar health problems.

  • Debbie Seiler

    This article was nothing compared to the documentary…it was difficult to watch to say the least. Maybe things aren’t as bad in the US as in the UK (where the documentary was filmed). Otherwise, how could there be so many arguments in favor of selective breeding. It’s almost like the purebred owners – no question dog lovers – are brainwashed into believing that the resulting mutations don’t pose health risks? Just look at the deformed hind legs of the winning German Shepherd. How does the owner sleep at night? Hugging their Best In Show ribbon no doubt.

    Don’t just read the article, watch the documentary. There are vets, orthopedic surgeons, genetic researchers, gait/locomotion experts (not just self interested breeders or a vet clinic employee) , who all agree that this level of inbreeding is a tragedy. The British government is considering taking over the privately owned Kennel Club unless they re-evaluate their standards for pedigrees.

  • Neil Kaye

    I was angry watching this program, basically because there is no need to be breeding AT ALL . . it’s not like we need more dogs! Until there is a home for EVERY dog born today breeding should be stopped completely. Breeders are selfishly causing pain and death to millions animals every year. Don’t shop, ADOPT!

  • nicole:)

    that dog is sooooo cute:’)

  • Meezer3

    Breeding selectively for a purpose (example: Dachshund hunting Badgers, etc) has not been the problem. Actually when you think about it these breeds they, in the beginnings, were “mutts”..bringing together many breeds for the purpose of producing a “specific type”. The problem lies in what -others- have -done- with the breed from that point on. What ever hybrd vigor there was was literally bred out of the dogs by doubling up or even tripling up on specific individuals to “improve” the type for success in the show ring. When that happens the potential for disaster looms even larger. Its not the breeder who suffers but the poor person who comes along to buy a puppy (kitten, horse,rabbit,etc) as a pet. Almost a ticking time bomb.
    I have never bred dogs, but have had experience with purebred cats and can see the similairities there. With any specie of animal not paying attention to your bloodlines and breeding for the show hall can spell disaster.
    I agree though about “mutts”- the potential for any disease to manifest itself is there, but maybe not to such a
    high percentage rate.
    I have considered myself buying a specific breed of dog..but first and foremost, I am doing my reasearch and educating myself to the breed and its health problems first…then trying to find a responsible breeder who follows good breeding guidelines. My thought is never rush into purchasing a animal. Take your time and research, research, research…
    This is all in my humble opinion.

  • Shar Pei Stud Dog

    Hi,
    I enjoyed reading your website but I do not necessarily agree with everything written. I love my dogs (Sharpei) and they are happy and healthy. My Leo is a shar pei stud dog and I chose him because he has not too many wrinkles, no eye problems and has not needed tacking. Take a look at his website if you want to see some pictures of him. Leo the shar pei stud dog
    Thanks
    Leo’s responsible Owner

  • david portman

    Get rid of those dogs and get a cat!

  • ddesertdawn

    Good sound selective breeding helped to ‘produce’ helpful dogs. When done responsibly, it made sense. NOW these poor dogs are being bred into deformed practically nonfunctioning state and it is simply not fair to them. Do mixed breed dogs suffer from bad gene mixes? of course! But nothing like the deformaties that humans have forced upon these poor creatures such as English Bull dogs who can rarely breed without a laboratory–either at conception or delivery. Something wrong with that!

    Let’s get off the PUREbred idea and get back on the Purpose BRED idea.. with one of the purposes being healthy dogs.

    dD

  • Kathy

    I would have liked a chart that identified the main problems by as many of the breeds that is known. Then I’d know what to look for in a particular breed.

    This article forces me to read through it, hoping that information was available (probably not). I’m already familiar with the information in it, so I’m looking for something different from your regular visitor.

  • Pastshelfdate

    Aw, I was hoping to see all of dogs, part 2. All I found was a preview. My friends come over Sundays, so I can’t watch then, I can’t afford a Tivo, and I can’t stay up late enough to watch a rebroadcast. If these episodes are stored on another site, please provide links.

    On the other hand, I do very much appreciate the text versions of parts of the episode. With ADD, I have much better recall for print than for audio sources. Thank you.

  • Killerxx777

    nice,help with hw

  • ptosh

    good hw help cool to learn, five stars

  • jasmine roberts

    i love dogs!!!!!!!! I can’t stand when people say they hate dogs and when they say this is a dumb website.Well if it’s so dumb,why are you on this website???????????

  • http://www.diamaxol.info Danita Rudat

    Hi there I loved your article. I feel that it is vital when talking about diabetes to at least refer to natural therapies that have been proven to be efficient in controlling high blood sugar. Many natural herbs can be including in a diabetics routine that can help maintain a healthy glucose level.

  • raywilliamjhonson

    I am astonished with your article. I read it and I thought it was absoulutly amazing. I would like to say that you are an incredible person for reading this. I found this informaition very useful. Thanks for your help..

  • ethan

    why are you guys on this website?

  • natalie

    could sum1 help me wiv selective breedin plz

  • http://www.badcredithomeloansrefinance.net home loan refinance advice

    explains to you start using a superb website respectable Provides gives thanks for the doing work tough to guide me personally

  • !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    Thankyou! THis helped me with my report dsoooooooooooooo much

  • Chloe

    Very good, helped me a lot with my essay :)

  • Eva

    ALL THE DOGGIES ARE DEAD BECAUSE OF THESE DISEASES!!!! ITS SOOO SAD!!! I WANT TO GIVE ALL THE PUPPIES A HUG AND TELL THEM ITS OKAY!!! I LOVEE DOGGIES!!

  • the guy that was on earlier

    lol i did my science work with dis

  • Nick

    This helped me realize why my cat lived longer than my dog, my cat wasn’t a selective breeding cat, but my dog was and suffered the heart disease

  • Spencer

    Can’t believe that a group of Super Christians hasn’t come to rant here yet. Only a matter of time.

  • Fidel

    I agree with you spencer and decided to start a church now. Thanks for the encouragement and uhhhh. Yeah i’ll get my hindu christian people to rant.

  • Spencer

    Um, ok. Thats great, I look foward to it. /Sarcasm

  • Nancy

    AETHEISTS!!!

  • Spencer

    OH NO THERE HERE!!!

  • Spencer

    I thought it would take you at least a minute or two to get people.

  • Nick

    whats this have to do with aetheism?

  • Spencer

    It’s Atheist not aethiest….

  • Nick

    It matters how its spelled?

  • Spencer

    Yes.

  • A Fat Priest

    UNHOLY UNHOLY UNHOLY!!! I CANT GET CLEAN!!! UNHOLY!!!

  • Spencer

    FATTY FATTY FATTY!

  • Spencer

    Who are Nancy and Fidel?

    Btw, Christians believe in 1 god and don’t believe in 10,000 others. Atheists just don’t believe in 10,001.

  • Buddhist guy

    Is it allah?

  • Some guy who lives with his mom

    Whats this about atheists? I thoguht this was about cute puppies! well puppies that get sick then die really fast and sadly.

  • Spencer

    Atheists are awesome, thats what.

  • Nick

    Im nick and i like spencer

  • A guy who ias cheating on 6001 people at the moment

    3002 of the people i am cheating on are theese dogs

  • Guess who I am

    Guess my first name for 1 million dollars.

  • nicks gueeses spencer

    i guess spencer 1 million is mine >:D

  • Angelina Jolie

    Hi.

  • Spencer

    No way your the real person.

  • Bob Marley

    Hi

  • Spencer

    Wth is with all the famous people on this comment thing.

  • barack obama

    Since im a fat non educated guy, i ban this site like bottled water.

  • Spencer

    Go die you horrible person.

  • Nick

    Thats no way to talk to the president! you didnt even cuss!

  • Egypts President

    None of you are from Egypt right? We don’t allow internet there.

  • Inglip

    All must become a gropaga or you will be sent to Palin University.

  • Mongolia’s leader

    We don’t allow technology here period.

  • Spencer

    Don’t worry Lord Inglip I am a gropaga.

  • Fidel

    Here i got some people who would like to share some words, but i told them to say the same thing spencer

  • Hong

    Rant

  • Keith

    Rant

  • Harrison

    Rant

  • large dog mom sonia

    This is why I love mutts. They aren’t subjected to breeders’ focus on appearance over health and end up generally being much stronger health-wise than their purebred counterparts. There are still issues (large breed dogs will always be at risk of joint problems, for example) but it’s not nearly as bad as with dogs that were poorly bred.

    Not saying that all purebreds are poorly bred – but most people buying purebreds don’t know what to watch out for. Stick with mutts :)

  • emily

    ya poor dogs

  • matty ;D

    I love dogs :L x

  • blooh blah

    i eat bunnies for dinner all the time

  • says: says: says:

    haha typo

  • On your Left

    Wow…

  • Audra McDonald

    I didn’t know so many risks were linked to breeding!

  • Ayanna

    I think this article is really sad. People need to learn to be more careful with their actions.

  • audra

    hey ayanna! what kind of dog are you going to get? does it have a genetic disease?

  • Ayanna Wendy’s (lol)

    im getting an sustralian sheperd and i hope not!!!

  • Ayanna

    oppss meant Australian Sheperd

  • ardua (audra)

    aussies are so cute! did you find it on petfinder? is that a good website to use? I like to look at the aspca website. they have some cute puppies too.

  • Ayanna AUDRA RULES!!

    yep its really good and me 2 their really cute!!!! so watcha doin!!???

  • johnny test

    im hungry

  • Oli Martin

    This Really helped me with my work thanks,
    Its quite worrying to see the real extent of problems that can strike dogs just becasue of selective breeding.

  • http://www.usvisacenters.com h4 visa

    Basically to follow up on the up-date of this theme on your website and would really want to let you know just how much I prized the time you took to write this useful post. Within the post, you actually spoke on how to actually handle this thing with all comfort. It would be my personal pleasure to collect some more tips from your web-site and come up to offer others what I have learned from you. Thank you for your usual great effort. f1 visa

  • Jeff

    Find a breeder that has a degree in genetics, doubt you will, all these breeders use pseudoacientific justifications for the harm they cause and they pander to the narcisism of people who are “not mixed breed kind of people”. Eugenics (the so called science use to determine akc purebreds) was the science hitler used to justify the extermination of the jews. Sounds like a pretty bad company to be in to me!

  • Jseca Y9

    From GMO to breeding dogs we have always tried to play God. Appears that we will leave nature to nurture only after we have destroyed our own existence

    The only place I loved to see the britiesh bull dog was in wwe and games like these

  • http://www.dryskinondogs.org/ dog dry skin

    Thank you, I’ve recently been searching for info about this subject for a while and yours is the best I have found out so far. But, what about the bottom line? Are you positive in regards to the source?

  • leo

    it is great! but da thing that i wanted was the problem with SELECTIVE BREEDING IN DOGS!!! please u idiot!!!

  • Teannna Byerts

    Wish I could se the whole episode!

    Only responsible breeders (working to improve or continue a breed, or breeding working dogs) should be breeding, the rest of us should adopt. That said, there are many responsible breeders out there(one of my personal favs is Karen Ramstead who breeds Siberians who excell in the showring (”pretty”) and the Iditarod Trail (working dogs)).

    A story I read in Whole Dog Journal suggested the Dalmation genetic problem had been worked on: by introducing outside bloodlines (I think it was another type of hound). The genetic issue was solved, the “crossbred” dogs looked and acted precisely like Dalmations, but the breed registry would not accept them. Sticking to the “purity” of your bloodlines at the expense of a breed’s health is ridiculous.

    As for ‘Designer Dogs” (back in the day, we called them mutts), they are no different from various crossbreeds that have been done over the years in the horse world; crossing different available types or breeds to create a new type for a specific job (ie: the Thoroughbred, created from Arabian stallions and heavier English mares).

  • JD

    My first Bernese Mountain Dog (male) was a wonderful companion but lived only nine years, a bit younger than what I’ve read about this breed. He was a great dog who was smart and easily controlled. After his death I decided to get another Bernese. I went to the same breeder who I consider to be very ethical about breeding practices. Along came another Bernese male pup that turned out to be an exceptional friend and companion. He lived only six years and died of a major organ failure that spared him, and me as well, the horror of a lengthy disease process. He died lying in his favorite spot beside the front door while I was petting his beautiful double coat. He allowed me to issue my wishes by sight or sound. I never needed a leash for him. Both of those dogs are buried side-by-side in the rear of my property.

    After a pause for some thought I felt I didn’t want to deal with another short lifetime again and decided against another Bernese. I visited an SPCA with the thought of getting my name on a list for a mixed breed pup in the springtime. I was shown a one year old male Great Pyrenees and spent an hour with him in a run and decided then and there to take this gentle large dog. That was a year ago and I have no regrets, even though he chewed up a couple pair of new socks that I had not put away. So Enzo and I are good friends now and I have learned to put things like socks in a drawer. I’m looking toward a good future with this dog.

    JD

  • http://www.newsmarkt.eu/news.php?title=Internationale-Spedition-Brauer-in-Bremen transport polen

    Internationale transporte firma

  • http://buttfat.org Greg Redknapp

    Thanks for this helpful site. I know that many women struggle with having a big butt. Your info makes sense.

  • Boy doing homework

    very helpful and helps me decide what dog to get when i’m older. Thank You.

  • Kool jonathan

    Thx! I copy pastid 4 a scool project! I got a A+

  • #55

    puppies are fun, go huskies

  • #9 morgan bates

    GO HUSKIESS> YEEEEEEEEEAAAAAHHH HUSKY PRIDE

  • someone else

    dogs aere cool

  • someone

    hello

  • bill

    beer

  • http://yellowwatch.info mega watch

    This just goes to show how essential it truly is to very carefully look at the Methods section of a research paper. This doesn’t mean that what the researchers discovered is just not true, but in no way can we conclude that meat calms males down till a study having a far better methodology is conducted.

  • me

    I LOVE DOGS HAHAHAHA

  • http://www.nowamb.pl Budowlane Sklepy

    I enjoy you because of all of your labor on this site. Debby really likes setting aside time for investigations and it’s really obvious why. Most people notice all concerning the lively method you offer vital ideas through your web site and in addition improve participation from website visitors about this issue so our favorite girl is understanding a lot of things. Take pleasure in the remaining portion of the new year. You are always doing a stunning job.

  • Susan Boyle

    YO! im suboooo and i love to rap, init brv ;D xx

  • http://theseobacklinks.com/?author=1 The Seo BackLinks

    Heya i am for the first time here. I found this board and I to find It really useful & it helped me out a lot. I hope to present one thing back and aid others such as you helped me.

  • The New Guy

    Hi everyone
    This a question: brachycephaly gene in bulldogs has that all was been there and became worst with inbreeding or is this cause by cross breeding with a Pug. There is no proof that a Pug and a bulldogs was cross bred. I will like if some with knowledge about this can contact me. Please please
    Thanks for a great program

    Email vontanzler@gmail.com

  • Berneice Kolbo

    Just ordered my free trial, thanks for sharing this offer, I was about to buy it at full price!

  • citbank online

    Come to think of it, my dachshund’s breath is much worse than any of the other dog’s iv’e had. Sounds like this is a trend. Try a baking soda and water mix to bruch their teeth.

  • banking online a

    Yes. If you play the original game, you’ll get better equipment the longer you play within the limit of your level. In vanilla Daggerfall, if you play long enough you will find Dwarven equipment even at level 1. As for the combat implications, the effect is minor and essentially gives you some small feeling of continuous progress.

  • Evangeline Masero

    For Google to have a problem, Oracle would have to first convince a court that decompilation is as actionable as copying the actual source code

  • The_Scottish_Girl

    Thanks, was a lot of help for my persuasive essay which i am doing about selective breeding in dogs.. only thing is, what can we do about it? Like anyone is gonna just stop breeding certain kind of dogs…

  • http://whatishighfructosecornsyrup.com all about high fructose corn syrup vs sugar substitutes

    Heya i’m for the first time here. I came across this board and I in finding It truly useful & it helped me out a lot. I’m hoping to provide one thing again and aid others such as you aided me.

  • Shanelle Bomba

    The name for this condition is acquired immunodeficiency syndrome (AIDS). As the medical community learns more about how HIV works, they’ve been able to …

  • chiropractor

    This is such a fun event. I did it years ago with my daughter (now 21) and I think it’s about time I take my 9 year old son for his own safari experience.

  • Ivory Rublee

    Well said Tim. Tricking Google may save a little work now, but it’s going to cost you a lot of work later.

  • http://windowslaptop937.wetpaint.com/page/Windows+7+Laptop+Starts+Up+Very+Slow windows laptop free xbox

    many thanks about your posting. quite gud.

  • Pemmom

    It’s a shame that your article doesn’t include information from National breed clubs that have worked tirelessly to eliminate many of the disorders you site. The Canine Health Fund has and is working with most purebred clubs to help identify and erradicate many of the diseases you mention. There are tests for almost all of the disorders and good, responsible breeders test for them. The myth of “mutt” or hybrid vigor is just that. The problem is that there are no consistent gene pools of “mutts” to test for disease.

    You do a great disservice to the vast number of purebred breeders who test before breeding and to those who love specific breeds for very sound reasons.

  • Yo MAma

    I Like This, It was loads of fun!

  • Sophia

    Helped me with homework.wee

  • sophia

    how do write a comment?

  • jskdipsygfvayervlbevieygtvibtr;ib;fbifdsg;IRGGRIEG;KSJDBVMMASFUBGKsdjBVZXCBV/KZJSFHGU’OERGH’KAJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJBNNNNNNNNNNNHHHHH

    hi i h8 tators

  • http://restorationandcare.info if

    enjoyment, in relation to scuba diving because it gives the divers with a lot to discover as

  • http://www.freediscountcard.us world health care

    I?ll right away grab your rss as I can’t find your e-mail subscription hyperlink or e-newsletter service. Do you have any? Kindly allow me know in order that I may subscribe. Thanks.

  • http://honestqualityreviews.com/go/Renewable_Energy_Secret/41/1 Renewable Energy a Substantial Future

    I will right away grab your rss as I can not to find your email subscription link or e-newsletter service. Do you’ve any? Please let me know in order that I may just subscribe. Thanks.

  • http://dietaparadiabeticos.es/ Michael – Dieta para diabeticos

    I love this animal, very interesting article

  • john zscott

    i like inbreeding :D

  • john zscott

    and icest :D

  • john zscott

    *incest

  • yur mum

    hellllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllo

  • David

    I agree with those that believe that breeding should not be done AT ALL. This is yet another example of how humans attempt to manipulate nature – and screw it up in the process. Not to mention, there are millions of dogs in shelters now that need homes. Nature has billions of years of R&D. It knows what it’s doing.

    We combined the plant and animal kingdom to create GMO foods (which is beginning to reveal certain health problems). We burned millions of tons of fossil fuels (which causes a long list of problems to human health and the environment). Breeding dogs, and the misery it causes, is no different.

    There’s a little bit of mental sickness in those that manipulate nature – knowing that it could cause a health problem (or that it would prevent a dog in a shelter from finding a home) just to have a pet with certain characteristics that fit them. I wonder if these are the same people that choose their spouse based on the expected future appearance of their children?

  • jason

    i have a bloodhound named waylon he has had everything under the sun go wrong with him from angler limb disformaty a week after we got him to ? poision never found any,? know he has torn his acl mind you he just turned a year old i was wondering if this is do to over breeding ?one flea and he breaks out all over

  • HI!:)

    Spencer, i’m a christian and im not gonna rant about this page! i’m working on a project for my biology class about selectivly breeding dogs and this page was very helpful! i might not agree with everything it says but it gives a lot of great information about why all the dogs have different problems…its all because of the genes! i never knew any of this before i had to do this project. so spencer, i think you might have the wrong idea of who christians are and what christianity is all about…and no i’m not shoving christianity down your throat or anything.

  • Lynnie

    I agree with David, this is just wrong. Especially those who think that unless it’s purebred the dog is a peice of trash! I mean honestly, it makes me think of Harry Potter, the “true blooded” against others! I believe we should just sit back and let nature take its course, both with plants, animals, and everything! Just let it be!

Produced by THIRTEEN    ©2014 THIRTEEN Productions LLC. All rights reserved.

PBS is a 501(c)(3) not-for-profit organization.