Killerz, he hasn't made the association yet....that biting equals end of playtime. You don't even have to leave the room. Walk away and fold your arms, stare at the ceiling....LOL. Let him know that you won't interact with him the second his teeth hurt your skin. A crying out in pain just before you ignore him works with some dogs. Some think you're playing. Then that's no good. Reaching out with your hands, as in touching him can look like more play...not always as punishment. If you are very consistant, over time, he'll learn. Puppies don't learn how to be adults over night. These things take time. Their desire to chew, gnaw, bite is very strong. Its what they do.
I prefer to not use aversives like pain, fear, discomfort because with my puppies, I like to teach them bite inhibition, not that putting their mouth on me is altogher a bad thing. If my puppies mouth on my hand very gently, I'll continue to pat them or play softly. If their teeth come even close to causing me the slightest discomfort, I abruptly end the attention or playtime. The reason for this is that it works out with dogs.... so that in the future if a dog does bite, he learns to regulate the strength of his bite and he's less apt to bite hard. Later, I make it so the dog doesn't mouth my hand unless I invite him to. Then it must be a gentle game...ever so gentle. Then it stops when I say, "enough."
I prefer to not use aversives like pain, fear, discomfort because with my puppies, I like to teach them bite inhibition, not that putting their mouth on me is altogher a bad thing. If my puppies mouth on my hand very gently, I'll continue to pat them or play softly. If their teeth come even close to causing me the slightest discomfort, I abruptly end the attention or playtime. The reason for this is that it works out with dogs.... so that in the future if a dog does bite, he learns to regulate the strength of his bite and he's less apt to bite hard. Later, I make it so the dog doesn't mouth my hand unless I invite him to. Then it must be a gentle game...ever so gentle. Then it stops when I say, "enough."