Take the hottest peppers you can get your hands on and crush them especially the seeds put it around your coop and run it will denture rats snakes and any other predators or get a female cat 4-5mths old it will grow up thinking the chickens are normal part of your family and not bother them i have 4 cats and they protect my flock and play with the ducks no joke they chase each other its so funny to watchThis is new to me. Just saw the rat this evening. I will start by removing food in the evening, and putting the feeder back in at morning. Maybe it wont come back if theres nothing to eat lol
I am seriously going to take everything out of that run and put in 1/4 hardware cloth, including the bottom floor....arghhh! Thanks for the advice, I really appreciate it!Rats can almost fit into a 1/2" gap (I've actually found a dead one with it's head wedged into a 1/2" opening). You need to have everything bigger than 1/2" covered with 1/2" or 1/4" hardware cloth.
Taking in feed at night will also help discourage rodents, as they have no real reason to go in if there's no food available.
Yeah the chicken wire is the problem with regard to rats getting in. Its a shame chicken wire was used instead of hardware cloth or another sturdier fencing especially since a lot of effort went into building that coop.