My 9 month old has begun biting my breast when I feed him again. When he first got his bottom teeth he bit me twice and I detached him and told him no in a stern voice and it worked until recently. He has bitten me several times now and I do what I did before but it seems to not be working. I'm gonna keep detaching and telling him no but is there anything else I should be doing? I think he is teething this top teeth now, could that have anything to do with it? Getting sore and don't wanna wean him from the breast.