We've had our new cat, Henry in our house for two weeks and he is wonderful. He's a one year old neutered male (obvious, yes?) that we adopted from a shelter. The shelter wanted him adopted by himself so we're a one cat household. I've observed that he seems to bite (or more accurately grab our hands with his teeth) as a way of communicating with us. Gently (just holding on to our hand with his teeth) during petting (even at the beginning of petting), and less gently as a warning when we do something that he doesn't like such as picking him up the wrong way or at the wrong time. He's not exhibiting aggresive behavior and doesn't suddenly bite for no reason (his reasons of course). He doesn't bite very hard and doesn't come close to breaking the skin. How should I handle this? Can Henry distinguish affectionate biting from warning biting? If not, how can I stop him from biting without ruining our relationship?