UNDERGROUND REPELLANT Deer-Off, Inc. produces an animal repellant called BULB GUARD, which provides below-the-ground protection from deer, rabbits, squirrels and other burrowing pests. Prior to planting, you remove excess loose and dried plant tissues from each bulb, soak them in the concentrate, air dry and plant them. The repellant is made from natural, biodegradable food products, yet has an odor and taste barrier to ward off animals. Deer-Off, Inc.