I read an post on here on ridding rats from the chicken pen. Someone mentioned using Dr Bronners Castile Liquid Soap-Peppermint mixed with water. We have never had an issue before. We have had a pretty mild winter here in NY. The ground is certainly not frozen. I have been finding holes everywhere and poops in the nesting boxes. I'm scared and grossed out. We put water down the holes and the cats caught two....I know there are more. Any suggestions? Thank you!