Tractor Supply or other farm supply stores including Home Depot and possibly Lowes, sell smoke bombs that will clear them out pretty quickly. Then pour a gallon of straight sodium chloride bleach into each hole followed by chlorine "shock" for backyard swimming pools. That will keep them from coming back. If your out there in the country, a small bore .22 LR rimfire or personally I like the newer .17 HMR or WSM cartridges to dispatch them for good.
Tractor Supply or other farm supply stores including Home Depot and possibly Lowes, sell smoke bombs that will clear them out pretty quickly. Then pour a gallon of straight sodium chloride bleach into each hole followed by chlorine "shock" for backyard swimming pools. That will keep them from coming back. If your out there in the country, a small bore .22 LR rimfire or personally I like the newer .17 HMR or WSM cartridges to dispatch them for good.