Young moose must learn to swim, so that they can feast on pond weed and other aquatic plants. These plants are the main source of sodium for moose and only available for a short time during the summer months.
Not the most graceful thing I've seen.
But moose are such strong swimmers, she'll get it soon enough.
These guys really need to feast on this sodium-rich pondweed while they can.
Moose can store minerals in their body so efficiently that they only need to load up on essential elements like sodium once or twice a year.