Hi, we brought our Rotti pup home 2 weeks ago and he seems to find biting us a game, We have tried the biting tips of 'OUCH' and stopping play and have even had to give him a short time out in a room with closed door to try and calm him but then as soon as he's back with us he bites. He goes for feet and anything like skirt hems etc, in fact almost anything that moves or attracts his attention. We have tried to get him to burn off energy but this is hard as he hasnt had all his shots yet so we cant take him 'out' other than the backyard. HELP, I'm worried that this will become a habit that we will find hard to break and its very difficult to stay calm when his bites are painful.