This morning at 5am we awoke to our chickens squawking and flying into the roof. We ran outside, thinking our coop had been breached (we have reinforced it with hardware cloth with a buried skirt), but we went in and found nothing. Could rats cause our ladies to freak out like that? We have trapped some rats around and think they might still be getting in. We have 9 pretty large birds--3 americaunas, red star, australorp, brahma, barred rock, buff orpington, and a wyandotte. Can rats hurt a chicken?