Is Stormy a polydactyl cat (does he have extra toes)? Or does he just have good, dextrous use of his paws? We had a stray litter born at our house with three out of the four kittens being polydactyl. Two of the kittens actually had vestigial extra little paws, so that they could wrap two whole sets of front toes around the baby bottle when they were fed. I understand that Maine Coon cats often show polydactyly - and I am pretty sure that both their mother and their father are part Maine Coon. I have seen the presumed father, and he has extra toes. So maybe your blue kitty is also part Maine Coon, given that his brother looks like he is part Maine Coon. That would account for the size of the two of them.