I used to use poisoned Maize, some people call it Milo. At the feed store it’s called Gopher Bait.” I kept a a tee rod in the pickup along with some of the bait. When I saw signs I would push a hole with the rod and pour in about less than a tea cup full. It’s amazing that they find it but they do. Over time I virtually eradicated them from the pastures and meadow.