We've tried everything, deer piss, red cauyan (sp?) powder, differernt sprays. Nothing worked, until we used live traps. I take 'em to the forest preserves near us and let the red-tailed hawks take care of them. As Paul McCartney would say, "It's nature's way, it's nature's way." At least, I think it was Sir Paul.
Forgot to add, we use apple slices to trap them. They've ignored lettuce and carrots and such, so, we tried the red apples and it worked!
I've also read/heard somewhere that rabbits don't like citrus, so orange/lemon/lime peels in the garden may do the trick also.