I think it is unnatural, and cruel. (sorry)
animals have fur for a reason, to protect their skin from all sorts of things, scratches, heat/cold, drying out, ... to rob an animal of that natural protection through breeding, is wrong in my opinion.
Of course they might look "cute" - I just think it is selfish to do this just because you prefer "the look of it".
To me its in the same league with debarking dogs, declawing cats, dying an animals hair (everyone was saying "oh no!" in a thread in this forum when they talked about bleaching to keep a guineas fur white around the bottom - yet robbing an animal of said fur is alright?). Its making an animal permanently unnatural.
Just my opinion, I understand that some people on here really like them, well, I dont, not because it looks "ugly", but because I feel so sorry for those animals.