Hi! I'm new to gardening. Before I cleared out my beds it was all bluebells and crabgrass, and I never saw any rodents or birds in them. But now that I've cleared them out and planted strawberries and tomatoes and mulched them with straw, I've been seeing some strange holes. I don't see any activity during the day, they almost seem to appear out of nowhere. Whatever it is hasn't bothered my plants too muvh, except for one strawberry plant that got a little trampled. What could be doing this?