I agree with everything Play felt has suggested. I also wanted to add that I had a biter recently (18 months) who I nearly terminated because he was biting so many times a day. We did the time-outs and nothign was working and finally his mom sent him with his soother (which is normally only for naptime) and it worked! I use it for a week or two and since it was in his mouth, he didn't bite anymore...then gradually he stopped needing the soother and still no biting. We tried a teething ring attached to his shirt, but that didn't work for him...the soother was like gold! I don't know if the little girl you have has a soother, but if not , mabye a teething ring attached to her shirt could help? Oooh, I feel your pain...biting is the worst behaviour issue I have had to deal with so far!