Permethrin Horse Fly Spray That Kills On Contact — Made in Canada

GHS Extenda Shield is a ready-to-use, veterinary-grade insect spray from Remedy Animal Health that kills and repels horse flies, mosquitoes, ticks, lice, and 10+ other biting pests. Formulated for Canadian barns, pastures, and trails — no mixing, no measuring, just spray.

Pests It Kills & Repels

• Horse flies, stable flies, deer flies, face flies, horn flies
• Mosquitoes — reduces vectors for West Nile and EEE
• Ticks — Lyme disease vector control
• Lice, gnats, black flies, chiggers

Why Horse Owners Choose Extenda Shield

• Triple-action formula — 0.5% permethrin + 1.0% piperonyl butoxide + 0.1% pyrethrins for kills-on-contact AND residual repellency
• Ready-to-use 1L pump spray — no dilution, no special equipment
• Made in Canada — manufactured by Remedy Animal Health for Canadian climate and pest pressure
• Multi-species labeled use — horses, ponies, cattle, and other listed livestock
• Long-lasting protection — fewer applications, less fly-stress on your animals

Ideal For

• Pasture turnout during peak horse fly season
• Daily barn and stall application
• Trail riding, shows, hauling, gymkhanas
• Ranches, dairy operations, beef cattle producers
• Boarding facilities and lesson barns

How To Use

Shake well. Apply as a coarse spray to wet the hair coat thoroughly — focus on legs, shoulders, neck, back, and tail. Avoid eyes, mouth, and open wounds. Re-apply as needed for continuous protection.

Active Ingredients

Permethrin 0.5%, Piperonyl Butoxide 1.0%, Pyrethrins 0.1%

Important Safety Information

Contains permethrin. Do NOT use on cats or species not listed on the label. Do not apply to foals under 3 months. Do not use on horses intended for slaughter. For external use on animals only. Keep out of reach of children. If irritation occurs, consult a veterinarian.

What's In The Box

One 1L bottle of GHS Extenda Shield with pre-installed pump sprayer head.

Need the bulk size?

Save per millilitre with our GHS Extenda Shield 4L Refill Jug — ideal for stables, ranches, and high-volume users.

Made in Canada by GHS / Remedy Animal Health. Ships from Canada.