I live in the country with cornfields on 3 sides of my house. There is a small pond with tree cover in the middle of 1 field, about 130yds from me. I have something burrowing into my chicken coop. The diameter of the holes are about 3 1/2" - 4" or so with mounded dirt from digging around holes. I put a box over the 1st hole, and about 5 days later it had burrowed under the box, came up and then dug another hole into my chicken coop. It has to burrow 10" deep to get into the coop. I don' t know for sure if it is getting eggs, but there is chicken feed in there also. Any ideas what it is ? Thanx