We brought home our new baby Trinity last week, and needless to say we've been very busy. She seems to be really sweet-usually. All she wants to do is sit on your chest and sleep most of the time. Today though, she was trying to fall asleep and my boyfriend was messing with her, trying to keep her awake because she cries in her crate all night long, and she growled and snapped at his nose in a very viscious way. He was by no means hurting her, but she was really mad. She has also been very mean to my 6 year old daughter and my 6 month old Shih Tzu Gracie. I knew she was aggresive when we picked her, but she was the smallest of the litter and she had to be aggressive to get food and attention from mom. She was born in a really great environment, so I don't think that has anything to do with it. Do you think this will be part of her personality, or do you think she'll grow out of it? Please help, I'm getting concerned.