--- product_id: 16597782 title: "Farnam SimpliFly for Horses, Feed Through Fly Control for Horses, 3.75 lb" brand: "farnam" price: "$159.25" currency: USD in_stock: true reviews_count: 8 category: "Farnam" url: https://www.desertcart.us/products/16597782-farnam-simplifly-for-horses-feed-through-fly-control-for-horses store_origin: US region: United States of America --- # Feed-thru fly control 60-day supply bucket Stops fly larvae in manure Farnam SimpliFly for Horses, Feed Through Fly Control for Horses, 3.75 lb **Brand:** farnam **Price:** $159.25 **Availability:** ✅ In Stock ## Summary > 🐎 Outsmart flies at their source—because your horse deserves a fly-free zone! ## Quick Answers - **What is this?** Farnam SimpliFly for Horses, Feed Through Fly Control for Horses, 3.75 lb by farnam - **How much does it cost?** $159.25 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/16597782-farnam-simplifly-for-horses-feed-through-fly-control-for-horses) ## Best For - farnam enthusiasts ## Why This Product - Trusted farnam brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Season-Long Protection:** Start early spring, continue through fall for consistent fly population reduction. - • **Break the Fly Life Cycle:** Diflubenzuron targets larvae in manure, stopping flies before they hatch. - • **Comfort-First Fly Control:** Reduces stable flies by up to 100%, keeping your horse focused and comfortable. - • **Seamless Barn Integration:** Works perfectly with sprays, masks, and traps for total fly defense. - • **Safe & Palatable Daily Use:** Alfalfa-based pellets your horse will actually eat, safe for all breeds. ## Overview Farnam SimpliFly is a 3.75 lb feed-through fly control supplement for horses that uses diflubenzuron to interrupt the fly life cycle in manure. Designed for daily feeding, it integrates seamlessly with topical sprays and fly masks to reduce stable fly populations by up to 100% over a 60-day period, ensuring a more comfortable environment for horses across barns, stalls, and pastures. ## Description The most effective way to control flies around horses is to stop them at the source before they become adult flies. Left untreated, manure from a single horse can produce thousands of flies in one day. Farnam SimpliFly Feed-Through Fly Control is a palatable alfalfa-based pellet designed with Larvastop, containing the fly growth regulator Dimilin, to provide fly control for horses by interrupting the fly life cycle where flies breed. The active ingredient diflubenzuron passes through the horse and deposits in manure, preventing larvae from developing. SimpliFly works in manure rather than on the horse to provide barn fly control and stable fly reduction without sprays, wipes, or topical treatments. Safe for daily use in all horse breeds and formulated without organophosphates, SimpliFly Feed Thru Fly Control mixes easily into your horse’s regular feed for equine management and insect control. For best results, begin incorporating this equine feed supplement in the early spring before flies appear and continue through warm weather to support consistent fly control in barns, stalls, paddocks, and pastures. For complete management, combine feed-through fly control with topical fly sprays, fly masks, fly traps, and other barn fly control methods to help protect horses throughout fly season. Review: Worth your money!! - We gave this product a try for the first time and literally don’t regret it at all. Within a week and a half to two weeks we noticed a difference for sure. We just do one scoop a day in their feed. Great product overall, it’s my second time ordering this and instantly noticed the effect of it. LITERALLY LESS FLYS in the stables for sure. Highly recommend it!! Review: It works! - We love this fly preventative and so does our livestock. No pill to take just some pellets to add to their food ONCE a day. It must taste yummy, because my horses and Donkeys love it. Flys seem to less too. I highly recommend SimpliFly ## Features - Feed Thru Fly Control Supplement: SimpliFly works best alongside topical fly sprays and physical barriers like fly masks for integrated, whole-barn pest management - Works with Your Fly Control Program: Use alongside a fly spray for horses or fly masks, and other horse fly protection methods as part of a complete barn fly control strategy - Stops Flies Where they Breed: This equine daily supplement features the active ingredient diflubenzuron that passes through the horse unabsorbed and works directly in manure to prevent fly larvae from developing into adult flies - Safe for Daily Use in All Horse Breeds: Add palatable alfalfa-based pellets to your horse's daily feed for consistent fly deterrent support in stalls, pastures, paddocks, and dry lots - Feed-Through Fly Control for Horses: SimpliFly Feed-Thru Fly Control breaks and prevents the fly life cycle in manure, helping reduce stable fly populations and providing reliable fly control for horses in barns, stalls, and pastures - Season-Long Fly Population Reduction: Begin feeding in early spring before flies appear and continue through summer and fall to support fewer flies and stable fly prevention - Farnam Equine Supplement in 3.75 lb (60-Day Supply) and 10 lb (160-Day Supply) Sizes: SimpliFly feed-through fly supplement is packaged in convenient buckets for horse owners, providing easy daily feeding and tack room storage - Larvastop Technology for Fly Larvae Control: Diflubenzuron acts as a targeted feed-through larvicide that prevents fly larvae from developing in manure without the use of organophosphates - Ideal for Barns, Stalls, and Pastures: Helps reduce fly populations in horse facilities where manure accumulation allows flies to breed and multiply; this supplement is highly palatable - just add to feed - Helps Maintain a More Comfortable Environment: Reducing fly populations helps support horse comfort during turnout, feeding, riding, and training; reduces fly populations by 97-100%. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000HHM4TQ | | Active Ingredients | SimpliFly® with LarvaStop™ contains 0.24% Diflubenzuron (Dimilin®*) (CAS# 35367-38-5). Feed ingredients: Wheat Middlings, Dehydrated Alfalfa Meal, Calcium Carbonate, Sodium Chloride, Calcium Propionate (preservative). Active Ingredients SimpliFly® with LarvaStop™ contains 0.24% Diflubenzuron (Dimilin®*) (CAS# 35367-38-5). Feed ingredients: Wheat Middlings, Dehydrated Alfalfa Meal, Calcium Carbonate, Sodium Chloride, Calcium Propionate (preservative). See more | | Age Range Description | All Life Stages | | Allergen Information | Yam Free | | Best Sellers Rank | #14,492 in Pet Supplies ( See Top 100 in Pet Supplies ) #15 in Horse Fly Repellents | | Brand | Farnam | | Brand Name | Farnam | | Customer Reviews | 4.6 out of 5 stars 1,443 Reviews | | Global Trade Identification Number | 00086621001640 | | Included Components | Farnam SimpliFly Feed-Thru Fly Control Brown 3.75 lb Bucket | | Item Form | Pellet | | Item Type Name | Farnam SimpliFly Feed-Thru Fly Control | | Item Volume | 0.45 gallons | | Item Weight | 3.8 pounds | | Manufacturer | Central Garden & Pet | | Manufacturer Part Number | 100515881 | | Model Number | 100515881 | | Pet Type | Horse | | Recommended Uses For Product | Fly control in horses through feed supplementation, part of integrated pest management program | | Scent | Unscented | | Scent Name | Unscented | | Target Species | Horse | | UPC | 086621001640 | | Unit Count | 60 Ounce | | Volume | 0.45 gallons | | Warranty Description | Call with comments or questions: 800-234-2269 | ## Product Details - **Age Range (Description):** All Life Stages - **Allergen Information:** Yam Free - **Brand:** Farnam - **Color:** Brown - **Item Form:** Pellet - **Item Volume:** 0.45 gallons - **Item Weight:** 3.8 pounds - **Scent:** Unscented - **Unit Count:** 60 Ounce ## Images ![Farnam SimpliFly for Horses, Feed Through Fly Control for Horses, 3.75 lb - Image 1](https://m.media-amazon.com/images/I/71o00lzoHOL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: does it works for cows?** A: I don’t think so. Cows are ruminates and horses aren’t. **Q: Why won't it ship to my California address? What am I missing? I just bought one at the local Tractor Supply...here in Cali...** A: I'm not sure what the answer is, but I have noticed there are numerous items I have ordered that are not shipped to California for different reasons. Sorry I could not give you a more definite reason. **Q: I lost the little measuring cup. Can someone tell me exactly how much it holds when it is full?** A: It looks to be about 1/8 ounce. **Q: Hi, do you have a product called ralone duo top or some other product to cattle weight gain?** A: no ## Customer Reviews ### ⭐⭐⭐⭐⭐ Worth your money!! *by K***S on July 10, 2026* We gave this product a try for the first time and literally don’t regret it at all. Within a week and a half to two weeks we noticed a difference for sure. We just do one scoop a day in their feed. Great product overall, it’s my second time ordering this and instantly noticed the effect of it. LITERALLY LESS FLYS in the stables for sure. Highly recommend it!! ### ⭐⭐⭐⭐⭐ It works! *by M***N on May 4, 2026* We love this fly preventative and so does our livestock. No pill to take just some pellets to add to their food ONCE a day. It must taste yummy, because my horses and Donkeys love it. Flys seem to less too. I highly recommend SimpliFly ### ⭐⭐⭐⭐⭐ It works! *by S***S on June 27, 2026* I was very skeptical since the equine industry is full of “snake oil companies” but I started feeding this out since April and as we enter July I’ve hardly seen any flies. Will definitely keep this on my regular schedule. ## Frequently Bought Together - Farnam SimpliFly Feed Through Fly Control for Horses, Breaks the Fly Life Cycle, Pellets, 3.75 Pound Bucket, 60 Day Supply for One Horse - Farnam Repel-X pe Concentrated Fly Spray for Horses, Just Add Water 16 Ounces - Farnam Repel-X Ready-To-Use Fly Spray, Insecticide And Repellent For Horses And Dogs, 32 Fluid Ounces, 1 Quart Bottle With Trigger Sprayer --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/16597782-farnam-simplifly-for-horses-feed-through-fly-control-for-horses](https://www.desertcart.us/products/16597782-farnam-simplifly-for-horses-feed-through-fly-control-for-horses) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-10-06*