You read that right. Holey with an "e." As in holes. Our property is punctured with holes. They're everywhere. I'd say there are at least a hundred of them, probably more. They're not mole hills (we get those, too). These holes are used by some other rodent(s), as yet unidentified. I've never seen so many holes in the ground. And it's not just us; our neighbors have them, too. But we seem to have more per square meter. I worry about Tasha getting hurt by stepping into one of the holes while running around in the yard. So far, we've been lucky.
I wonder if the proliferation of these holes, in our yard at least, has something to do with Bert the cat being gone. He caught (and ate) a lot of mice during his life. I'd guess about one a day, on average. He spent a lot of time hunting. Now that he's gone, there's no predator in our yard.
On the bright side, we don't have mice in the house. Bert used to bring them in after he caught them. He ate most of those, but we still had to clean up after him. Yuck.