C.M.
Although I am not yet at that stage, I asked my mom for advice on this same subject. She said that if they bite while on the breast to pull them off (as long as they are not still biting--you don't want to cause damage to the breast), say No, put them back to the breast, if they bite again pull them off and that is the end of the feeding session. You can resume feeding after a bit (we don't want to starve the poor kid)and repeat if the biting continues. After a couple of times she says the baby will learn not to bite. Hope this helps.