Our first kitten tried biting us and my husband and I had two different approaches. I "bit" her back by on her neck with my fingers. It didn't hurt but let her know that I wasn't going to let her bite me. My husband does what has been suggested on here, he holds her tongue down. She doesn't like his finger staying in her mouth. Now with our new kitten, who was a bottle fed foster cat, we are having the joy of stopping her biting. Wendy is MUCH more aggressive but I have faith she'll stop.