The last few eggs I've gotten from a particular hen (I have 2) have had blood on them. I thought a trace here or there might be normal, but according to my daughter, there was more today. She said the hen was standing a little by herself, and when she turned around, her bottom was gross and bloody. She tried to get a picture, but the rooster kept getting in the way. Any ideas? Also, both hens are getting a lot of action from both roosters (one rooster will knock the other off and jump on) and the girls are losing feathers on their backs. Is this harmful or just irritating? Do I need to get rid of a rooster?