So she is biting out of anger? Sometimes babies bite just to bite or because they don't know what else to do, or maybe another child has bitten her and now she is biting... but if she is biting out of anger you just need to help her learn a different way of expressing her anger. It's okay to be angry... it's what you do with that anger this is bad! This will most likely NOT be a popular remedy but I have three children and it worked for all three of them. First of all, I tried the talking/time out, I tried the vinegar squirt in the mouth... I tried lots of things. But it wasn't until I bit them back that they stopped. Not too hard (don't leave a mark or anything) but hard enough that it gets her attention... and then I would say... "that hurts doesn't it? don't hurt mommy... if you are upset or angry tell me why?" Good luck!