Farnam SimpliFly Feed-Through Fly Control for Horses, 3.75 lb, 60-Day Supply

Farnam SimpliFly is a 3.75 lb (1.7 kg) feed-through fly-control supplement for horses, formulated to interrupt fly development in manure.

• 3.75 lb, a 60-day supply — fits a daily feeding routine through fly season.
• Diflubenzuron works in manure — targets fly larvae where they develop.
• Made without organophosphates — a defined feature of its formula.
• For daily use in all horse breeds — supports consistent feeding across breeds.
• Can be paired with sprays, masks, and traps — fits into a broader barn fly-control program.

Fly control can start at the breeding site: manure from a single untreated horse can produce thousands of flies in one day. SimpliFly is made for horse owners managing flies around barns, stalls, paddocks, pastures, and dry lots. Rather than applying a topical treatment to the horse, this feed-through supplement acts in manure, where fly larvae develop.

How does SimpliFly control flies?

Its Larvastop technology uses diflubenzuron, which passes through the horse unabsorbed and is deposited in manure, preventing fly larvae from developing into adult flies. The alfalfa-based pellets are designed to mix into regular feed, bringing the active ingredient to the manure breeding site. Manure-stage control helps reduce fly populations by 97–100%.

• Works in manure rather than on the horse.
• Provides fly control without applying sprays, wipes, or topical treatments as the feed-through method.

When should I start feeding it?

Begin in early spring, before flies appear, and continue through warm weather, including summer and fall, to support ongoing fly population management. SimpliFly is made for daily feeding, so it can be incorporated into a regular routine during the fly season.

• Mix the palatable pellets into your horse’s regular feed.
• Use in areas where manure can accumulate and flies can breed, including stalls, paddocks, pastures, and dry lots.

Can it be part of a complete barn fly-control plan?

Yes. SimpliFly can be used alongside topical fly sprays, fly masks, fly traps, and other physical or topical methods. Its feed-through action addresses larvae in manure, while the other methods contribute to a broader approach to fly management around horses and their facilities.

• Suitable for daily use in all horse breeds.
• Its formula is made without organophosphates.

Farnam SimpliFly suits horse owners seeking a daily feed-through option for managing flies at the manure breeding stage, especially in barns and turnout areas where manure is present. It works as part of an integrated fly-control routine, rather than as a topical treatment applied to the horse.

Ingredients

Larvastop