Earlier today I found one of my chickens dead. Her head was bloody and her eyes were gone. It looked like maybe she had been pecked to death. She wasn't new or injured. I've had injured birds before and none of the others bothered them. I've also had birds get into spats but nothing like this. Are there any predators that would do this (especially in daytime) or should I be concerned it's another chicken? I have a picture but wasn't sure if I should post it since it is very graphic. I also have a few turkeys and guineas. Has anyone ever heard of them pecking another bird that death?