My son adopted a terrier mix a few months ago and he is wonderful. They wanted to give him a buddy, so they adopoted another terrier mix, same age. This dog is awful. He is sweet to humans, terrible to the other dog. Humps him to the point of making the other dog very upset, steal his toys from him and destroys them, tries to steal his food, "plays" if you could call it that, very rough biting the other dog. They crated him in the bathroom the second day when they had to go to work. Thanks to the doggie cam, they saw him unlock the crate and open the bathroom door to get to the other dog. I don't know what to tell them, nor do I want this do in my home! They are trying everything they can think of because they would feel horrible if they had to take him back, but he is terrorizing their poor sweet dog!!