Thanks for all of the advice. The thing is I think she is in her phase of teething so she always wants to bite something. We've been correcting it by letting out a big "yikes" and she stops. I just feel bad for the maltese though because he seems so hopeless. My mom told me that maybe Belle thinks Bruce ( the maltese ) is one of her stuffed animals.
Anyways, we will try again and see if they can work it out. I'll report back