I had a similar issue with local rodents last summer. I had built a fencing system with chicken wire and a gate around the perimeter and still lost most of what I grew. While lamenting the situation to a friend, with a very successful garden, he explained I missed one key point in the fence system. This year I will hook up the chicken wire to a car battery in hopes of better results.
and thanks for the reminder that i need to start my seedlings.