I have five 9 mo old chickens that like to sleep on top of the coop instead of inside it. Last night I heard wings flapping at 2am so I went out to investigate. 4 of the chickens were still on the roof half asleep but one was on the ground by the run door and had a patch of feathers about the size of a silver dollar missing from the top of her neck. No puncture wounds or blood. I was surprised that something was able to roust her and lure her off her perch without disturbing the other girls. The location I found her does have a gap about 1 1/4 inches where there is no hardware cloth. Does this sound like something a rat could do? Or do you think some other predator reached in and grabbed a handful of feathers?