How to Humanely Get Rid of Groundhogs Predator Urine. Cats are natural groundhog predators. Gardeners have had the most success using cat-urine-soaked kitty litter as a groundhog repellent.

Groundhogs can easily be mistaken for other similar rodents, such as gophers, voles, and moles (if moles are the primary culprits, the best mole repellents may get rid of them). The rodents ...