My partner and I have a three year old female green cheek. She is incredibly sweet, and has never displayed outright hostile behavior towards anyone. We are briefly living with my family, and for several months she and my father got along fine. Recently she has started biting my father, who then tries to shoo her away which sets her off even more. With everyone else she is perfectly calm and sweet, but he just sets her off. He seems unwilling to do much work to rectify the situation, so what can be done from our end to help prevent our green cheek from attacking? At the moment we just keep her away from him, but obviously thats not always feasible.