I have a 10 week old (female I think) pekin. I hatched her from an incubator. I only have two other pekin (her parents) I've tried several times to let her go with them and my male attacks her. I though he was just showing dominance but he pins her down and will not let up. She's been in a wire cage in their run so they can be exposed to each other and he still attacks every time I let her go. I'm not sure what to do. I want her to be free but I'm scared he's going to kill her. Any suggestions ?