Well Yukon has been on full exercise for a week now and what a change. He is much more relaxed and much happier. He no longer bites at anyone. He is still mouthy but that is to be expected of a 6 month old. He is not aggressive on his walks with anyone. He is much nicer to have around. He does not pee on the floor anymore either. He has just become a great dog! He does still push between us and the kids but we are working on that. Not a big deal because he is improving, and the major problems are solved. It is amazing what some serious exercise and some serious training can do with a dog. He is like a completely different dog now.