I have ground gophers - I can't really hang anything for them, but this looks like it's a great trap for hanging in the trees for the nasty squirrels.When squirrels chew their way into my grain/seed buckets I hang a #110 conibear body trap in front of the opening.
I caught 5 squirrels in one day that way.
http://www.flemingoutdoors.com/duke-110-body-t.html
My gophers just make for sprained ankles. They have never gone near the coops, so we've left them alone. We started putting the feed away at night, and that seems to be slowing.down the number of holes we see digging into the chicken runs.