over the summer/fall, it became apparent there were rats stealing our chicken feed. We have had chickens for seven years and never had a problem with rats. We built a garden coop from plans we bought online, and covered the entire coop with hardware cloth, which we also buried 12" underground with river rocks. But the rats have dug an extensive network of deep tunnels more than a foot underground to get into our coop and eat the chicken feed. I tried trapping them, and while I was pretty successful, only the live traps worked. it is such a slow way to eliminate a population, and we all got tired of killing the rats we trapped. We don't want to use poison because of a fear that the chickens could somehow get the poison, or that a poisoned rat could stagger into their reach and they could eat the rat. (Chickens are crazy AF). We have been bringing ning in the food every night and putting it out in the AM but it's quite a lot of work and doesn't really work with our schedules. At the feed store recently, someone told me to buy bulk corn gluten and mix it into small balls with peanut butter and drop them into the rats holes. I have searched BYC and the bowels of google and can't find other people who are using this method, but I will say that it seems easy, cheap, safe to have around chickens... but is it effective? Has anyone else heard of this? Do you have any other advice or tips for things I could try? Thank you!