Aggression My 1 year old yorkie is generally a really sweet dog but for the past month or two, he's been biting and growling out of the blue. One moment he'll be super happy and playful, the next he's not so nice. Whenever we approach him, he'll bare his teeth at us and eventually, jump and bite. We just got him neutered, hoping his aggressiveness would stop. He has barely changed! Help! |