Okay, I have been going through this myself. It's really hard for the puppy to learn that my kids are not his littermates. So, I spoke to a couple of trainers at PetSmart. One recommendation was worth a try. I bought a bottle of bitterapple. I sprayed the puppys tounge when he bit. And, I sprayed my kids. I also sprayed my woodwork and my couch. I have noticed a change. Just putting the bottle in my hand is enough for him to stop now. I still say NO biting, make him settle, and encourage kisses. But, the bitterapple has helped.