When You See What Hundreds Of Years Of Selective Breeding Has Done To Dogs, It Will Make You Sick.

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The process of selectively breeding dogs has developed over the last 1,000 years as a way to “engineer” dogs for different types of work and play. But where it once may have served a purpose, it became more about aesthetics over time.

As a result, many dog breeds are nearly unrecognizable from a century ago. Worse still, many of the changes bred into these dogs have caused major health complications.

Have a look at some historical breed images placed side-by-side with the modern versions of the these breeds. The comparison will surprise you.

1. St. Bernard.

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