Fly Bye! Plus Fly SpraysThe Fly Bye! Plus Fly Spray utilizes a new, revolutionary soy based technology to create an all natural fly spray! The unique soy formula, with added geranium oil, is designed to protect horses against flies, mosquitos, gnats, and ticks. What makes this fly spray different from others? It works on a molecular level. When a fly comes near the spray, it feels a molecular change in its exoskeleton. For survival, the fly moves away from the horse or the