Our coop door for the chickens to get in and out froze, and caused a large crack to appear so something could slip inside. Earlier today the chickens started making a warning call, but quickly quited down. Our husky saw something, however, but we thought nothing of it. Unfortunately, just a tiny while ago, we found a dead chicken, stiff as a board. There were no dead chickens this morning, so it must have happened shortly after we fed them and left for the day. We found footprints that circled the coop multiple times, and it DID get into the run. By our observations and the size of the hole, we believe that it was a weasel. We managed to close everything off, so is it worth setting out a trap if the predator can not get inside? Also, out of curiosity, the chicken did NOT seem to have it's head off(although it was really hard to tell), and there was not any blood. Is there any possible way one of our three roosters managed to drive it off? I have a niggling suspicion they are not any help in warding off anything. I have heard multiple stories that once a weasel got inside, you can see damage CLEARLY to dead chickens, and that more than one is normally killed. Is this true?