Went out this morning and found my white female has had her head pecked to the skull (yes it's actually showing). She's a little lethargic but otherwise fine. She's the only white one in the bunch and had a small tuft off black on her head. I have no idea who did it but I think it was my male as some of the others are missing feathers on the backs of thier heads. What would cause him to do this? I've separated her and plan on trying to nurse her back to health but I understand the odds. My other question is if I need to separate my male for fear of him doing this to my other birds?