I seems that these cats learn to use the large paw to advantage. One of my friends says that they use the paw like a catcher's glove. It doesn't affect them much, although some with more than six do have some problems, especially in keeping it all clean. I am in principle opposed to breeding for genetic defects in animals as well as in plants. That is why I won't even have variegated plants or double flowers.
Variegated plants are subject to diseases because of the lack of chlorophyl.
It should be illegal to breed animals for weaknesses. I like plants the way they have developed by themselves. All the roses in my garden, for example, are wild ones which I dug up by the railroad tracks. I don't have to worry about rust or mildew or any other disease with them. And I think they are much prettier than the overbred roses that everyone else grows and just as fragrant.