I live in an area with lots of rabbits around. This past summer I had some problems with these cute little critters running around eating the bottom 12" of the foliage growing in my garden. They'd just nibble away. I live in the city, but there is a tract of land behind my house that contains lots of rabbits. I have a black metal fence that runs around the yard, and I'm loathe to get a brick wall or anything of that sort. Is there anything I can do to deter the critters?

Thanks for your help!