We live in the country and have squirrels, ground squirrels, racoons,deer, groundhogs, coyotes, you name it and we had the same problem but here's how we cured it. We got rid of the problem by giving up our bird feeder...sob, sob,sob....in the summer. My son built me a 4 ft. tall and 4 ft wide planter on stilts. We planted tomatoes, cucumbers, onions. All going well. Only had two bad tomatoes and they were the first ripe ones and we had a really cold spell come through and I think that was the culprit. All since have been beautiful with not a spot. We did not use any kind of fencing above it other than just wire so the tomatoes had something to climb on. Hope this helps. Next year he's building me more raised planters so we can plant more things.