Toby is hyper but manageable. He plays well with the maltese gals but does not enjoy the company of other people or other dogs. But with three obedience classes, we have managed to train him to not be hyper hyper or aggressive. He's smart as a whip and very loving with me and the hubby. We adopted him from the "second" owner at six months old and he has come a long way. I wouldn't trade him for the world!!!! I love him just the way he is! I think the malts have toned him down a bit though!