Well Mack is a pitbull american bulldog mix. He definetely has the look of a pitbull, sometimes when he stands at attention he looks american bulldog though. He acts like both of them though, he acts just like a...BIG BABY. Maverick is SUPPOSE to be a collie/husky mix but I'm not sure. He has the coloring of a collie and I would have to say the additude of a collie and a little husky. He LOVES to herd and he's like 10 weeks old only. But him and Shelby are both big attention hounds and if they aren't th star of the show 24/7 they will cry until they are.