Transform Your Barn Into a Fly-Free Zone — Automatically Barn flies don't just annoy — they stress horses, spread disease, and disrupt your daily routine. Country Vet Fly Spray Automatic Metered Refill gives you 30 days of hands-free protection with natural pyrethrin technology that delivers a precise knockdown every 15 minutes. No manual spraying, no chemical buildup, just consistent coverage for up to 6,000 cubic feet. The 0.975% pyrethrin formula is derived from chrysanthemum flowers and EPA-registered for safe use in stalls, tack rooms, feed rooms, and grooming areas. Unlike topical sprays that wear off, this system works around the clock — so your horses stay comfortable and you stay ahead of the flies. Why Barn Managers Choose Country Vet Metered Refills Set-and-forget convenience — One 6.4oz canister delivers exactly 30 days of protection when paired with a Country Vet automatic dispenser on 15-minute intervals. Natural pyrethrin formula — 0.975% active ingredient from chrysanthemums provides instant knockdown against flies, mosquitoes, and gnats without harsh synthetic chemicals. Wide coverage area — Treats up to 6,000 cubic feet (roughly 30' x 20' x 10'), ideal for individual stalls, tack rooms, or feed storage areas. USDA-rated for agricultural use — Safe for barns, dairies, kennels, and even food-handling zones when used as directed. Fresh outdoor scent — No heavy chemical smell — just a clean, professional finish that keeps your facility pleasant for horses and humans alike. Indoor premise protection only — Designed for air treatment, not direct application on animals, so your barn environment stays pest-free 24/7. Best For Barn owners and stable managers looking for continuous, automated fly control without daily manual spraying. Frequently Asked Questions Q: How long does one refill canister last? When used with a Country Vet Automatic Metered Dispenser set to 15-minute intervals, one 6.4oz canister provides 30 days of continuous protection. That's one full month of hands-free fly management per refill. Q: Can I spray this directly on my horse before riding? No, this is a premise spray designed to treat the air in enclosed spaces like stalls and tack rooms — not for topical use on animals. For on-horse fly protection, you'll want a separate equine fly repellent formulated for direct coat application. Q: Is it safe to use in my feed room or near hay storage? Yes. Country Vet Fly Spray is USDA-rated and EPA-registered for use in agricultural settings, including food-handling areas. Just follow label directions and ensure proper ventilation in enclosed spaces. Q: What size area does one canister cover? Each refill covers up to 6,000 cubic feet — that's roughly a 30' x 20' space with a 10' ceiling, perfect for a single stall, small tack room, or grooming bay.