I recently purchased a purebred yellow lab. I got it from a breeder, but probably not the best breeder because he was only 6 weeks old. I have had him for 5 days now, and so far he is a joy. However, he has a small problem with biting/nipping. At first it was kind of cute, but they are starting to hurt, and I want to "nip this in the bud" for lack of a better term. I have been told that puppies taken away from their litter before 9 weeks don't learn that biting hurts. I have tried pretending that im a dog, and yipping and moving away from him when he bites. This just makes him think its a game and he will chase me around. I have tried giving him toys, and he likes them, but he has a short attention span and will sometimes choose my arm over the toy. I have tried putting him down and subdueing him, but that just seems to make him angry, and he gets up ready for more. My uncle actually bought a female from the same litter, so I was thinking of letting them play together to interact, but will this be enough? Will this go away in time? I don't want my lab biting people, even if he thinks he is just playing.