Polydactyls have an extra pad under that "thumb" and one or several digits
I wonder if polydactyls inspired the three little kittens nursery rhyme as these cats look like they have mittens.
So they are upstairs in the nursery now, toddling around like little drunkards. Already purring when held. Now think of the irony:
The wonderful woman who rescued these babies has cancer and the horrible man who dumped them is probably in good health.