A friend owns a working dog, she pays for all expenses, food, vet, toys etc and She takes the dog for training, to work etc, all the friend does is house the dog at his home, does he have any right to claim ownership of the dog if all he is doing is housing it? He has demanded she sell him the dog as he has legal right to take it, but we can't find anything that says he can take ownership of her dog from her. I know when I went through this with my ex, I won custody as I paid for all expenses and trained and housed our dog. I should add they are just friends, nothing more. Just curious if anyone knows if there's any links to legal info on this?