Something keeps digging a huge tunnel under the concrete slab of my garden shed. I’ve tried filling it in, but it’s back every morning and I’m worried the foundation will crack. What would you do?

is to use predator urine or commercial repellents around the burrow entrance.

Creating noise or vibrations, such as with wind chimes or ultrasonic devices, can also deter groundhogs. The goal is to make the environment uncomfortable so the groundhog will naturally seek a new location.