When I play frisbee with Henry he goes after it and then chews on the frisbee. So then I go over and get it from him and throw it again. Today, he was grouchy and he growled and snapped at my hand when I tried to get the frisbee from him. I immediately stopped playing and put him in a time out. Was that the right thing to do? I am getting little worried cause when he gets bored now he is more aggressive and destructive, and when I try to play with him I can tell he's definitely being cranky and snapping.