Our flock is free range. We didn't close the coop a couple nights and in the morning while it was still dark they were outside and there was a bit of a ruckus. It's possible something got to them when they went out in the morning or even maybe got into the coop at night. Either way what we found left was just guts near the coop and the chickens hiding. Needless to say we've made sure to lock them up at night and not let them out till later in the morning. Just wondering what we're dealing with. Any ideas?