Hey everyone. This is my first time owning a dog. I've had him since he was 9 weeks, he currently just turned 10 months. He was big on nipping, and biting when he was much younger then he stopped and now he's back at it. He bites me when I come through the door and I don't pay him attention right away, he does it when I'm walking him and I stop and talk to my neighbors, and he does it when I'm home and he wants to play. I have tried everything that I have read in these forums and online. I have screamed "ouch" and that makes him pause for one second and then he bites again less hard but continues. I spray him and nothing happens. I leave the room and then he resumes after I come back. I give him time out and he jumps up and down and doesn't listen and thinks it's a game. I ignore him and this frustrates him as he makes this noise and pulls my sleeve harder or bite harder as if to say why aren't you paying attention to me. I have no idea what else to try. It's getting to the point where I'm loosing my patient and I'm getting really frustrated. Please help!!!!