Horse Fly Spray - Cedar Bug-Free Horse Fly Spray. Kills Flies. Fly Repellent - 32 oz Insect Repellent for Horses Kills Flies, Ticks, Mosquitoes, Gnats and Other Bugs in Stalls and Paddock More Effective and Longer Lasting than most other products All Natural - Safe for You and Your Horse 10% Cedar Oil - compared to weaker products that contain only 1% or less of their active ingredient