11/20/2012

Veterinarian Greg Perrault says many veterinarians appreciate the variety among their patients, and he points out that although humans and their animals share many similarities, there are also important anatomical and physiological differences between humans and dogs, cats, birds, elephants, ferrets and whales. Often, the differences emphasize how form fits function, as in the sense of smell: Dogs have up to 220 million olfactory receptors, compared with 5 million in people.

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