The Negative Effects of Pure-Breeding in Pictures (Science of Dogs)

BIG Black Dog Isolated on White (XXXL)Man’s best friend has gone through over 100 years of breed “improvement,” or pure-breeding — but have progressively become more and more unhealthy for the sake of appearance. The “Science of Dogs” blog looks into how pure-breeding has physically affected dogs since 1915, comparing older photos of dogs with recent ones. The Bull Terrier, for instance, now has a mutated skull and a thick abdomen when it once was an athletic, healthy dog.

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