According to the guys that come out and poison the multitude of gophers we have in our field, they use zinc oxide, predators don't eat the stomachs. We were concerned about neighborhood animals catching and eating gophers and dying. We were assured that would not be the case.

The zinc oxide is buried down inside the gopher tunnels so it is not a problem for wandering animals.

We also have a problem with voles. The issue with the vole poison is that it is put down on top of the ground and neighborhood dogs who wander through our field would eat it because it looks like dog snacks. Fortunately, we've not had that much of a problem the last couple of years with either the voles or wandering neighborhood dogs!

We don't have moles where we live, we just have gophers and voles.