I have put Harley into obedience classes at Petsmart with great success. Our trainer is wonderful and really seems to care. She herself owns 3 Great Danes and brings them with her and they are very well behaved and one is only 6 months old.
Just my opinion but I really feel that this training has helped us to bond even more. And this training could even save his life at some point.
We're only at the halfway point but Harley can "sit" and "stay" and "leave it" and "take it". We're working on "drop it". Next week he has to sit and stay while a stranger pets him. Don't know how that's gonna go.