He decided the way to do it was to breed selectively.

They have been selectively bred to find their way home.

They have been selectively bred for 15,000 or more years to live with people.

That's what people like, so the birds have been selectively bred to satisfy our wants.

Those puppies were selectively bred for other characteristics, and so on.

Dogs during ancient times were selectively bred and seen in Chinese paintings.

Or is it a negative trait that humans have selectively bred for?

Those animals were then selectively bred over the years.

Purebred dogs have been selectively bred for thousands of years in some cases.

It would, however, probably still be selectively bred outside the program in an effort to create more white Siberian tigers.