HI All, We are new to this and trying to figure out the best solution to prevent digging animals from getting into the coop. We have a lot of moles, voles, and other various hole dwelling animals. My husband thinks the best way is to put a concrete foundation about 8 inches deep around the outside of the coop. I have searched on this site to see what everybody else does. I see the skirt is suggested, but I don't know if that will prevent the animals that are already underground from getting in. Is the concrete foundation a decent plan? Is 8 inches deep enough? My husband is a contractor so can pretty much make anything that would make it safer for our chickens. Our chicken coop plan is a 6x14' run with a 4x6' henhouse on the second floor. The chickens will be let out into our fenced backyard most days for at least a few hours when the dogs are inside. Thanks for any and all suggestions!