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?

12 inches in diameter. You may also notice dirt mounds near the entrance. However, other animals like skunks, raccoons, or even armadillos might also be potential culprits, each leaving distinct signs.
To confirm it’s a groundhog, look for tracks that are roughly 2 to 3 inches wide with five toes, or set up a trail camera to capture the nocturnal activities. Knowing the species will help tailor your approach to deterrence and removal.
2. Understand Why Groundhogs Love Your Shed Foundation
Groundhogs are attracted to specific locations for burrowing due to safety and food availability. Your shed provides a sturdy, sheltered environment that protects them from predators and harsh weather conditions. The surrounding vegetation might also offer a bountiful food source.
Typically, groundhog burrows are designed with multiple tunnels and chambers, which not only serve as living spaces but also as food storage and nesting areas. Understanding these preferences can