Help! We have a 9 week old Rottweiler that we've had for two weeks. He is very nippy, and we need help curbing this behavior. We have tried the following: giving a firm "NO" and replacing our hand with something he is allowed to chew on, ignoring him as soon as he starts to nip so he isn't getting the attention he wants, and also tried giving a firm "NO" and putting him in his kennel for several minutes (a local trainer said minimum of 15 minutes, but we don't want to reinforce the idea that if he howls, we will come, so we usually wait until he settles down). It isn't a mean or vicious biting, he never snarls or growls, but we need to stop this behavior. It's hard to play with him or even pet him without getting nipped. Some people may think it is a dominance thing, but I'm not sure. We work on that in other ways that are going well (for example, not letting him come in the house first, but instead, making him sit and stay while we walk in and then telling him when it's OK for him to come in, etc). Someone help! This is very frustrating!!