My Aunts little Pomerainan tries to bite her when she leaves, and also attacks visitors, she is having trouble training him to be nice. He's only 1 year old. He seems to like me really well, and loves to play, I do stop and play with him alot when I am there, but my Aunt says he is totally different around other people....very protective when he doesn't have to be. Any suggestions as to training him to be more relaxed? or ...nice.?