Hi-Yield Mole & Gopher Bait Is Our Best Selling Mole Solution. The trick to getting the grain based zinc phosphate bait in the mole is to mix it with pure suet. Moles are meat eaters, so they don't go after grain unless they are really, really hungry. The suet is animal fat and the moles want it. This stuff is poison, so keep dogs who would dig away from treated areas. We have had the most reported success from customers with this product.