Farnam SimpliFly Feed-Thru Fly Control Pellets Horse Supplement

By Farnam
Rated 4.5676 out of 5 stars


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About This Item


  • Helps prevent the development of house flies and stable flies in the manure of treated horses.
  • These highly palatable pellets are made with alfalfa.
  • Only affects your horse’s manure—this supplement contains no organophosphates and passes through your horse without being absorbed.
  • Formulated with LarvaStop and diflubenzuron as the main active ingredients to prevent the formation of flies.
  • Simply add to your horse’s regular feed.

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Nutritional Information

Feeding Instructions

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Frequently Bought Together

This Item – Farnam SimpliFly Feed-Thru Fly Control Pellets Horse Supplement, 3.75-lb bucket
Rated 4.5676 out of 5 stars
$34.99Chewy Price

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Farnam Bronco e Citronella Scented Equine Fly Spray, 32-oz bottle
Rated 3.9778 out of 5 stars
$9.99Chewy Price

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Total Price: $100.97

About Farnam SimpliFly Feed Thru Fly Control

Break the Fly Lifecycle

Stop flies at the source with this easy-to-feed formula that keeps your horse’s manure from becoming a fly breeding ground. SimpliFly Feed-Thru Fly Control helps you easily reduce the fly population around your stable. Simply add the highly palatable pellets into your horse's daily feed to break the fly lifecycle right where it begins.

Feed-Through Fly Control

SimpliFly Feed-Thru Fly Control is an essential part of any fly management program for horses. The highly palatable pellets are easy to add to your horse’s daily feed, and they help significantly reduce the nearby population of house and stable flies.

Create a No-Fly Zone

Farnam’s No Fly Zone horse products provide comprehensive pest protection. The three-step approach includes the SuperMask II horse fly mask to BLOCK insects from your horse’s face, Endure Sweat-proof Spray to REPEL pests, and SimpliFly Feed-Thru Fly Control to REDUCE flies. Together, they help keep insects away from your horse’s face and body, act as a safeguard against six types of flies, gnats, mosquitoes, lice, and deer ticks, and prevent the development of house and stable flies. 

Easy to Feed Alfalfa-Based Pellets

SimpliFly Feed-Thru Fly Control comes in a highly palatable pellet mixture that will blend right in with your horse's feed. Simply top-dress the product on grain or mix it in with your horse's total daily ration. The feed will pass through your horse unabsorbed and only affect the manure.

Easy Application

When SimpliFly Feed-Thru Fly Control is fed daily, house and stable flies are unable to develop in a horse’s manure. The fly lifecycle is interrupted and the fly population takes a direct hit, reducing the number of pests. The active ingredients in SimpliFly Feed-Thru Fly Control act in the horse's manure, not in the horse’s body, for a safe and simple fly control solution.

About Farnam

For over 75 years, Farnam has been a leader in equine care. Their mission has always been to strengthen the bond between horses and humans with simple, effective, and innovative solutions. Choose Farnam horse products to help make every moment of your time together happier, healthier, and more enjoyable.

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Top IngredientsDiflubenzuronCorn Distillers Dried Grains with Solubles, Wheat Middlings, Salt...Brewers Yeast, Diatonaceous Earth, Garlic...Garlic, Mint Herb, Oregano Herb...Micro-Encapsulated Dry Active Saccharomyces cerevisiae (CNCM I-1077), Micro-Encapsulated Dry Active Saccharomyces cerevisiae, Dried Saccharomyces cerevisiae Fermentation Solubles...
Health FeaturePest ControlPest ControlItch & Redness Remedy, Pest ControlDigestive HealthDigestive Health
Food FormSupplementSupplementSupplementSupplementSupplement
Special DietNon-GMO

Questions & Answers

6 Customer Questions

How long does it take to be effective?
Answer by ChewyJun 30, 2020
Farnam® SimpliFly® Feed-Thru Fly Control contains an insect growth regulator which prevents the development of house flies and stable flies in the manure of treated horses as soon as it is digested, but is not effective against existing adult flies. In some cases, supplemental fly control measures may be needed in and around paddocks and buildings to control adult house and stable flies which can breed in other decaying vegetable matter or silage on premises, or that migrate in from other areas. SimpliFly® should be used as part of an integrated pest management program aimed at reducing fly populations in the horse's environment. In order to achieve optimum fly control, this product should be used in conjunction with other premise and on-animal products as well as good management and sanitation practices.

Is this safe for donkeys?
Answer by ChewyAug 06, 2021
This supplement is suitable for all equines except horses intended for slaughter.

How long does a bucket last?
Answer by ChewyOct 26, 2023
For one horse the 3.75 lb bucket has a 60-day supply, the 10 lb bucket has a 160-day supply, the 20 lb bucket has a 320-day supply, and the 50 lb bucket has an 800-day supply.

Does this repel mosquitos
Answer by ChewyJul 17, 2022
When used with the Farnam fly spray (sold separately), this supplement can also control other pests like mosquitoes, gnats and ticks.

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Rated 4.5676 out of 5 stars