So as I’ve been working to install my pool and deck and patio I’ve noticed a number of small holes in the ground like this:

They’re about an inch in diameter and some of them are very close to some of the leg supports for the pool and I’m concerned that something might be tunneling under the supports and could cause problems.
Any ideas on what might be digging these holes?

They’re about an inch in diameter and some of them are very close to some of the leg supports for the pool and I’m concerned that something might be tunneling under the supports and could cause problems.
Any ideas on what might be digging these holes?