Bec you are doing a fantastic job. I agree with the others that the biting is her way of venting her frustrations. When Matilda was that age (not long ago...) she would throw massive tantrums to the point where she would hold her breath & pass out, or throw herself into a wall... real physical battles. DH & I get frustrated and we may growl from time to time, but there is no physical outworking of frustration from us. Matilda goes to family day care & the other children were often in the line of fire when she wasn't getting her own way & wasn't being "understood" I felt awful everytime she bullied another child. She did grow out of it. And she did behave better towards other children. She still has tantrums & even bit me the other day... BUT its a rarity now & I know she's just pushing boundaries every once in a while.

And like Shannon said, I have never had a problem with rougher kids or Matilda being rough because the parents have always dealt with it (or I have had too) immediately.