That's very sad to hear.

From the clip I assumed they were similar to dachsunds and corgis; i.e. short statured breeds or just a random sort of mutation. It is even more sad to hear that breeding for these traits has caused such pain and problems for these kitties. Are there indeed some that are random? I know the grumpy cat is a kitten of two regular sized cats, maybe the parents are related if it's a genetic disorder?