What kind of rodent/animal is making these holes?

are there tunnels close to the surface? If so it’s a mole or vole. They are eating grubs.

If you have a dog they’ll take care of them. Mine cleared 6 acres in a couple months

Looks like armadillo digging up grubs

Looks like armadillos if there is no connecting tunnel.

Armadillo holes have a slight backward angle to them. Think of how they dig with their feet directly out in front of their body with not much play side-to-side. They smell really well and can sniff out a single grub below ground. They'll dig several little holes usually getting a grub in each one. A skunk digs more randomly and makes a mess of the ground. Moles/voles have connecting tunnels between holes that run just below the surface.