Something digging under my garden?
I have a 10x20 vegetable garden plot. I planted some lettuce & spinach about a month ago, so there are a few seedlings, but it's mostly just dirt (waiting to plant the rest until later this month). There is something digging under the dirt - the only evidence are mounds of dirt. When I step on them they compact back down. How can I figure out what it is, and what to do about it?