My feral cats are getting old and hard of hearing and don't work as well as they used to. I struggle with rats under an outbuilding near the coop. I finally blocked up the underside of the coop so they can't get in there but the outbuilding had woodchucks and now rats. Most of the ones I catch are in a bucket trap. I shoot some. The cats get one now and then. I use an A24 trap and I use RatX which actually worked pretty well so long as they eat it for a few days in a row. You really have to eliminate the food. My wife loves to feed scratch in the run..that's a problem. She feeds the birds outside the house all year...that's a problem. In what little spare time I have, I need to now block up the outbuilding so they're less inclined to get under it. It's an old, old house so they have plenty of places to go. It's more a matter of making their food source scarce.