These are my first two shelter dogs with my sister. What do you think? We now have 5 shelter dogs and ALL are well behaved. None of them have ever tried to bite me. (Except my mom's dog, but she's not from a shelter) None of my shelter dogs have any major issues other than just being dogs. The one purebred that isn't from a shelter is the one that's been the hardest to housebreak, too.