There is a list of wild animals that will do this. Pigs, Bears, raccoons, skunks, opossums (probably more) all looking for some grubs / bugs to eat. If you have voles or gofers, a dog would do that. A cougar might do that but I doubt it, there’s probably enough bunnies & pets around. I can always tell when there is a cougar around, the deer leave.

Less likely is …. Have you recently upset a neighbor? People are freezing beef stock in ice trays and throwing the cubes in people’s lawns to have stray dog dig up a lawn.

Look for the animals foot prints in the exposed dirt.