Diagnosed by vet as dominance and aggression....

So, I took Kuma to a new vet today. The vet is wonderful. However, the visit was awful. He was totally out of control - never seen him like that.

She asked a lot of questions and was really concerned and helpful. She did a full exam and think there is no physical problem. She thinks he has a dominance and aggression problem. And I believe it, especially after this visit.

I feel sort of at a loss. We have been doing training - have completed 3 obedience classes and were planning on signing up for agility. We have been strict with him - I think. But perhaps not strict enough?