It seems that Bella could be suffering from a form of separation anxiety. This could also be many other things, it could come down to the simple fact they she needs better training. Which 90% of the time is the case. I would start off crate training her, see how she does with that. Alot of times if its separation anxiety they will do horrible in a create and drool everywhere. I would then slowly ween her off the create then allow her to stay in a room by herself. Make her think you are leaving and then listen once you hear her starting to tear into something simply correct her, do NOT yell at her or hit. You need to teach her some basic commands like No, or leave it This will insure that she understand that you wish for her not to be ripping apart your things. You can find addition information over at American Pit Bull Terrier Training If you seek further training all resources are provided. Hope this helps and good luck with the little one.