My 6 month old chi in the last couple of weeks has started to snarl, bark and try to bite people when they pet him. He has always been a very good natured puppy until now. He usually loves people...I made sure to socialize him like crazy when he was small. I'm hoping he's going though an adolescent phase or something. He gets neutered in a couple of weeks. Will this change him back to the sweetie he was before? I know he's also teething right now too. This is exactly the behavior I didn't want and now I'm scared he's always going to be acting vicious. What's going on, and what can I do?!! Thanks.