Last night my pharaoh roo decided to scalp one of the english whites I bought a few weeks ago. I'm not certain of the whites gender, but it's not swollen nor has it started crowing but no eggs either. The 2 that turned out to be roosters are both breeding, swollen and crowing. Will a roo scalp a hen for no good reason? I had checked on them looking for eggs, s/he was fine, checked back 10 mins later and there was blood everywhere. S/he was in a set up with a 1:4 ratio.