Is there any kind of plant that I can plant around the edges of my garden to repel the ducks from going in there. Don't get me wrong, it's very helpful to have the kids in the garden eating weeds but they are also walking on top of, and knocking over our veggies. It's kind of irritating my fiance. I would just put up a fence but don't have enough fencing to go around our rather huge garden at this time. Any suggestions?