Biting Incident :(

Well...we knew it was coming but didn't expect it to be so bad. Paityn for the last 2 months or so has been attempting to bite when she gets mad or upset but has never actually went through with it. She has leaned in but never bit. Well that all changed 2 days before Christmas. Paityn and Conner were playing on the floor. Conner had a toy and Paityn decided she wanted it. After trying to take it from him and Conner not letting go...she leaned in and bit his arm good! I mean a full mouth of 8 teeth and all! They occasionally fight but it is normally a lot of screaming until one finally gives in but now we will have to worry about biting from now on.