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Frequently Asked Questions

When should I start using SimpliFly?
Before fly season begins in your geographic region. When the first adult flies are seen, you want to have your horse(s) already dropping treated manure so that these first flies don’t reproduce successfully.

How long does it take to become effective once I start to feed it to my horse?
One of our studies demonstrated some activity 24 hours after initial feeding; however, you should expect to see results within 2 weeks. For best results, we recommend that you start feeding SimpliFly early in the year before adult flies begin to appear. Nevertheless, you can begin feeding even after adult flies are present and still achieve significant reduction in fly populations.

Does it kill adult flies?
No. SimpliFly has no effect on adult flies. By killing fly larvae, SimpliFly targets fly problems at the source. SimpliFly is intended to be part of an integrated fly control program. Fly sprays and adulticides should be used to kill any remaining adult flies.

What fly species does it kill?
SimpliFly kills larvae of house flies and stable flies. Both species are considered filth flies that feed and breed in manure and other decaying organic matter. On the average, a female fly lays between 500 and 1,000 eggs in her lifetime.

Is SimpliFly safe for mares in gestation and lactation?
Although efficacy testing has been completed, no testing has been conducted specifically on pregnant or lactating mares; therefore, the product is not labeled for such use. Even though we have no reason to believe that feeding this product would result in any adverse reactions if used as directed on the label, Farnam recommends consulting your veterinarian before feeding SimpliFly to mares in gestation or lactation.

Is SimpliFly safe for breeding stallions?
Although efficacy testing has been completed, no testing has been conducted specifically on breeding stallions; therefore, the product is not labeled for such use. Even though we have no reason to believe that feeding this product would result in any adverse reactions if used as directed on the label, Farnam recommends consulting your veterinarian before feeding SimpliFly to breeding stallions.

Any possible side effects of SimpliFly?
None observed in any of the efficacy studies we conducted.

How can we be sure SimpliFly is safe for all sizes of horses?
The amount of SimpliFly you feed will depend on the horse’s weight. The label provides dosing instructions for miniatures and draft horses, and the enclosed scoop is clearly marked at 250 lb. increments.

Are there any contraindications when using SimpliFly in conjunction with a paste or daily dewormer?
E.P.A. has approved SimpliFly as a “feed-through” fly control. There are no contraindications with any equine dewormers.

How safe is SimpliFly for the animal’s gastrointestinal tract?
We did not conduct any studies examining the gastrointestinal tract specifically; however, no clinical signs of GI tract problems were observed during the efficacy studies. Furthermore, Dimilin® (LarvaStop™) is also registered for use in sustained release bolus for beef and dairy cattle. The bolus remains in the animal’s stomach for up to 5 months, constantly releasing Dimilin into the manure to control flies.

How much does it cost?
If purchased in 20 lb or 50 lb buckets, SimpliFly costs less than $0.38/day per horse – a very reasonable price to pay for 97-100% reduction in your fly population! *

*97-100% effective for inhibiting the development of adult house flies and stable flies in the manure of treated horses
Dimlin® is a registered trademark of Uniroyal Chemical Company, Inc., an affiliate of Crompton Sales Company, Inc.