My 2 silkie hens grew up together and they are just over a year old now. This week the one started to peck and attack the other one. She is starting to get a bald spot on her head. Her feathers also seem to take long to grow out by her neck and torso. I assume she plucked some torso feathers as they are both broody. But it is way over 21 days that they have been broody. Could they just be establishing the pecking order (I only have the 2 hens) or is the one bullying the other? I don't want them to hurt each other and I don't know what else to do. Please help.