[yorkietalkjilly]

And don't forget the vet appointment and obedience training. Just good old basic obedience training and the enjoyment of working together with his master can transform a misbehaving dog and make him start to see you as his pack leader that he wants to respect and curry favor with - not try to dominate. Dogs are like children and happiest when they have love and always-enforced boundaries and lots of learning activities and challenges in life - otherwise they tend to act out. Getting him busy learning to mind you will help his attitude so very much but it takes work. You have to keep working with them in going through their little training activities if they are an easily bored dog or one with a tendency to want to dominate. But even genial, calm, submissive dogs enjoy training and work. But first be sure he's not ill or hurting, just to be on the safe side if his aggression truly did start suddenly and he was a well-behaved sweetheart before that.