Feel your pain with the mice problem. I seem to get mice in the fall that go after my sweet potatoes and then they move onto other goodies. I set plenty of snap traps in my compost bin and I also have excellent luck with a mini live trap by little giant. I keep my feed in my garage. Keep at it, check your traps multiple times a day and you'll be suprised how many of them little buggers you can get. Don't stop till you see no more signs and always have a few traps set even after they are gone (good luck with that).