I do have a squirrel that seems to like digging around in my beds. He doesn't seem interested in the plants themselves, he's just digging holes. But I'm worried that some plants will get damaged in the process. I haven't actually seen him so I'm not sure how exactly he's getting in. I'll have to keep a closer eye on the situation.
I also may have found a source for free, composted horse manure, already bagged. This will go a long way to reduce my overall costs.