3 Albino Bunny
One of the earliest noticeable mutations in changing a wild animal into a domestic one, is changes in color. People who breed animals often like something different from the type they were breeding away from - no matter what that change is.
This is an albino rabbit, like most albinos animals, the sunshine hurts his eyes.
Research laboratories like to use albino rabbits for their tests, because they all look the same, so the employees don't get too fond of any particular rabbit because they all look the same.