<Any dog can learn by experience
and perform given ample opportunity.>
If this were strictly true, it would be of no use to breed dogs for
performance at all, but it is a fact that generally dogs do what they are
bred for. Environment alone cannot account for the differences in the AKC
collie, the border collie, and their ancestor, the shepherd dog that Bewick
The fact that this difference exists because that is what the dogs were
bred for is hardly hypothetical!
Neither environment nor heredity are exclusively responsible for the
performance of a dog, It is a combination of the two.
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