We have a barn (no horses ) , but have had groundhogs move in.
This summer we had a professional trap 4 of them out of 5.

Now they are back . Any clue of what to do to deter them. They dug under the
hay rack and into the first horse stall.

Our problem now is they are going between the barn and our
house deck. Going to call the wildlife trapper again

Any ideas to prevent future problems?

(The coyote urine did not work)

Try to dig a few glas bottles half into the ground at locations around the barn where the wind blows. Like when you blow over the top of a bottle and it makes a sound.

I know it works for gophers.

Really? Does the bottle thing scare them away? I have to look that up. We have a problem with them here too and it drives me crazy!!!