E.F.
K.,
My friend was just talking to me about this on Sunday. Her first child was a biter, he would bite anything that moved or didn't move, not out of defense or anger, just biting. What a developmental health service worker told her was to give him lots of things he could bite on because he needed extra oral stimulation. (The worker also had a biter and this is what helped her) She kept a bag of pretzels (or what ever is a healthy snack that you child likes) with her at all times and about every five min she would give him a pretzel. And gradually she began to notice when he needed it and the increments got longer and longer.
Hope this is helpful and that you can find a solution that works!
E.