That would make sense if it were just that hole, but they have basically dug up the entire perimeter of the run as well. It's like they have dug a moat!
Our hens have started digging giant holes in the run. I wouldn't mind, but many of them are deep and are alongside the hardware cloth that we buried underground. I'm worried that all of these holes are going to make it easier for predators to dig under. I'm guessing if I fill them in the hens...