After battling deer, rabbits, squirrels and chipmunks, I have found only one thing that really does the trick on all these critters and is not toxic. It's called Deer-Off. Gaiam sells it but I've found it cheaper at my local garden center. Works great and you can even dip your bulbs in it before planting to keep the critters from digging them up and devouiring them. It even keeps the squirrels off my birdfeeder if I spray some of this stuff on the feeder! It's not cheap but a little goes a long way and each spray lasts about 3 months. I haven't tried the hair trick...sounds intriguing but I would guess the hair would blow away and have to be replaced fairly regularly. Someone suggested having my three guys pee around the plants (human scent), but that was way too fun for them and the plants would never survive!