Dogs: The Early Years Photo EssaySeptember 21, 2004 0 SHARES0 COMMENTS Explore more from this episode More Swipe left or right to view galleryFull Screen Dogs the Early Years34Like their ancestor, the wolf, dogs are intensely social pack animals. If fact, most dog behaviors can be understood by studying the behavior of wolves. 44Veterinary care is extremely important when adopting a puppy. In addition to shots, spaying and neutering is key to keeping the unwanted pet population down. 84Golden retrievers are a good choice for guide dogs -- they are a large, good-natured, adaptable breed.94While it is hard to resist an adorable face, a puppy should never be chosen on the basis of looks alone. Numerous factors should be considered when buying or adopting a puppy, including temperament, personality, and the dog's size as an adult.24Training is easiest when a dog is young. At six weeks, dogs are very open to new experiences. 16Puppies huddle together for warmth as they feed from their mother. Born blind and deaf, they instinctively find their mother's teat.124Beagles use their voices to communicate over large distances -- something prospective dog owners should keep in mind if they are looking for a quiet dog.114Calm, quiet dogs, bichon frisees were bred to sit on the laps of medieval courtiers, who believed lice and fleas would jump from them to the bichon's warm, hairy body.74Puppies sleep ninety percent of the time, and shiver in their sleep as their nervous systems develop.54Most dogs have been bred by humans to perform specific tasks. Terriers, for example, are determined diggers, bred to root out small animals from underground burrows. 64Adopting a puppy from a shelter is much less expensive than buying a pure-bred dog. It also saves lives: millions of dogs are euthanized each year when homes cannot be found for them.104 Dobermans are the result of a combination of a dozen different breeds -- they were bred to be alert, obedient, and aggressive.