I started three perennial plots in our backyard last year - Shasta daisies, black-eyed Susan's, coneflowers, purple salvia. The rabbits keep some of them gnawed almost to the ground. They overwintered fine but the bunnies are back. What can I do to keep the rabbits out? I know fencing is a solution, but not an attractive one as I already have vinyl fencing surrounding our back yard. I will fence if that is the only solution. Are there natural deterrents? Thanks!