So I am visiting my girlfriend, and I can't help but worry about my 5 year old staffy. Back at home she lived in a quiet neighborhood and didn't meet much people. But ever since we got here, too much worries me. She wanted to bum rush an exterminator visiting the apartment, but then acted like best friends when they met again outside. Went to get froyo, and she went ballistic at every other person/child. We chalked it up to being over stimulated between the heavy traffic and constant flow of people. The biggest concern is my girlfriend's roomate's girlfriend. She has been regularly suspicious of her between investigating what she is doing or staying near her food dish every time his girlfriend walks near it. Yet they (roomate and his girlfriend) were play fighting/wrestling in the kitchen and she ran in and began to jump up on them and even nipped her leg which she had NEVER done in the time I owned her. Other than that there hasn't been any noticeable aggressive body language. No growling, no teeth baring, no fear body language... Was she just trying to break up what she thought was a fight?