M.W.
My daughter was a biter and she just kind of grew out of it... One thing to try if you don't want to try the biting back thing (which I have also heard from many people works) is to attach a teething ring to the kid's shirt with a short string and a safety pin. Every time he bites tell him no, we don't bite people we bite this or better yet try to catch him in the act and put the teething ring in his mouth before he can bite. That is a trick one of my daycare providers used and she said it worked like a charm. I never did try that with my daughter cause she mysteriously stopped biting on her own, but it seemed like a good idea.