Formula 707 MultiFly Feed-Thru Horse Fly Control, 5-lb bag

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About This Item

Details

  • Made in the USA.
  • Contains Novaluron, an insect growth regulator, that helps to break the fly life cycle to reduce the fly population in your barn.
  • Just feed one serving to all of the horses in your barn per day to help prevent horsefly and stable fly development in manure.
  • Tasty alfalfa and wheat midd-based pellets are easy to feed.
  • By helping to reduce the fly population, this supplement may help to protect your horses from fly-borne contagious diseases.

Ingredient Information

Feeding Instructions

Comprehensive Fly Control

Formula 707's MultiFly Feed-Thru Fly Control for Horses offers a revolutionary solution for reducing fly populations in barns. The pelleted formula ensures efficacy by disrupting the fly life cycle in manure. Safe and easy to administer, MultiFly's active ingredient, Novaluron, prevents fly eggs from maturing, creating a healthier environment for horses and their owners.

The Formula 707 Standard of Excellence

  • Produced in-house in their equine-exclusive facility in Colorado
  • Science-driven formulas
  • Made with quality ingredients
  • Reliable excellence for over 75 years

Easy-to-Feed Pellets

Formula 707's MultiFly pellets feature Novaluron, a highly effective insect growth regulator (IGR). Novaluron works by disrupting the fly life cycle, preventing fly eggs from developing into adults. This helps significantly reduce the fly population around your barn. The tasty pellets, made with palatable alfalfa and wheat midds, are easy to incorporate into your horse's daily feed routine. By simply adding these pellets to your horse’s diet, you can provide comprehensive fly control effortlessly.

How to Use MultiFly for Best Results

For optimal results with Formula 707's MultiFly Feed-Thru Fly Control, feed the pellets daily to every horse in your barn. Each average-sized horse should receive one scoop of MultiFly. The active ingredient, Novaluron, passes through the digestive system and into the manure, disrupting the fly life cycle. Daily feeding keeps the manure inhospitable for fly larvae, significantly reducing the fly population in your barn.

About Formula 707

Formula 707 is a leader in equine health products known for quality and innovation. Manufactured in Colorado, their products are developed in an equine-exclusive facility, ensuring high standards of purity and potency. Formula 707 collaborates with experienced veterinarians to create effective supplements trusted by horse owners everywhere. When you choose Formula 707, you're choosing a brand that prioritizes your horse's health and happiness with safe, reliable products.

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Questions & Answers

6 Customer Questions

My chickens free range and scratch around in the manure. I am cautious, and they don't eat the horse grain but is it safe for them to scratch through manure while feeding this product?

Answer by JayDee • Aug 31, 2025
Our 60+ chickens are the cleanup crew for the 10 horse stalls…they all have enjoyed the grains, 707 multi-fly, and anything else that falls to the stall floors.

What is the day supply of this product?

Answer by Chewy • Mar 22, 2025
Using the scoop supplied with the product, mix one (1) scoop in the horse's ration every day for horses weighing less than 1,100 lbs. For horses over 1,100 lbs mix two (2) scoops in the horse's ration every day.

How long before we see a difference?

Answer by Chewy • May 14, 2024
Significant results may be observed within 2 weeks. 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 decaying vegetable matter or silage on-premises or migrate in from other areas.

Can I stop feeding it in the Fall? If not, when?

Answer by Chewy • Sep 12, 2025
This can be stopped when fly season ends or after the first freeze. Typically, it should be started again about a month before fly season begins or after the last freeze.
Reviews
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4.7
Rated 4.7 out of 5 stars
229 Ratings
Terms & Conditions

90 Customer Reviews

Rated 4 out of 5 stars
By Laura on Sep 4, 2025

Not the total fix; part of the solution

This is my first year to try feed through fly control. We had a case of Habronema with one of my mares, which is a horrible, horrible thing to deal with. It took

This is my first year to try feed through fly control. We had a case of Habronema with one of my mares, which is a horrible, horrible thing to deal with. It took two months of solid effort to heal the carnage caused by this fly and its larvae. I feel the flies have been somewhat reduced. There are times when I pick up the arena, stalls and paddock area that I definitely know there are less flies. However, feed through fly control is only part of the solution. I am picking up poop more often, using a perimeter spray on the feed tubs, diatomaceous earth in the dumpster and I should have bought stock in Piranha Fly Spray this year. I do have to say I started late on the feed through. Inn the future, because I live in a warm climate, I plan to suspend the feed through fly control only for December, January and February, start again in March and see if that makes a greater impact. I saw enough improvement to keep trying with this product, in concert with other fly control measures.

Rated 5 out of 5 stars
By Belinda on Sep 26, 2025

Excellent product

My 5 horses get this every day, starting March 1 until probably November. I have used it for 2 years. My horses have few flys, especially compared to the years

My 5 horses get this every day, starting March 1 until probably November. I have used it for 2 years. My horses have few flys, especially compared to the years I didn't use it. I've told friends about the product and they like it too. Now, there will still be some flys, but certainly not like it was prior to finding this product. It's fun walking out to see the horses and noticing flys are not here.

Rated 5 out of 5 stars
By Nina on Aug 25, 2025

It Works!

I pick up manure into tubs for a helper to come empty and spread once a week due to disability. When they were dumped, they were always full of larva, eggs, and

I pick up manure into tubs for a helper to come empty and spread once a week due to disability. When they were dumped, they were always full of larva, eggs, and maggots. Eeeew. I bought a 5lb bag to try it on my four horses. They accepted it without hesitation. Now, two weeks later, no more maggots/larva. NONE. And the fly population around the stalls and barn has dropped SIGNIFICANTLY in a few weeks time. I just ordered the 10lb bag. and will keep them on it until first frost and restart at the first sign of Spring fly activity. I am impressed to say the least. Finally, a product that works simply.

Rated 5 out of 5 stars
By Karen on Sep 21, 2025

Fewer flies

I started using this before Summer hit Maryland. It has definitely made a difference in the number of flies around my barn and paddock. I also put out two fly catchers

I started using this before Summer hit Maryland. It has definitely made a difference in the number of flies around my barn and paddock. I also put out two fly catchers to help. Between the two, the flies have been far fewer than any other years since I've been here (29 years).

Rated 5 out of 5 stars
By Julie on Sep 11, 2025

Works!

We use MultiFly for our 3 horses and it works great. We barely have any flies. I see better results than I did with SimpliFly. We start our horses on it around the

We use MultiFly for our 3 horses and it works great. We barely have any flies. I see better results than I did with SimpliFly. We start our horses on it around the beginning of April, before we start seeing flies, for best results.

Rated 2 out of 5 stars
By Jessica on Aug 13, 2025

Really wanted to like it

I did not see results in several weeks across 8 head of horses. I wanted to love it, I gave it a chance, but it was expensive to not see a change in fly production

I did not see results in several weeks across 8 head of horses. I wanted to love it, I gave it a chance, but it was expensive to not see a change in fly production. I won’t hesitate to try another product by this company, feed was always fresh etc

Rated 5 out of 5 stars
By Carol on Jul 17, 2025

Really works on flies!

This product is so easy to use, just top dress with included scoop. Even my finicky eaters didn't mind the taste. Within 2 weeks I noticed less fly population. I

This product is so easy to use, just top dress with included scoop. Even my finicky eaters didn't mind the taste. Within 2 weeks I noticed less fly population. I bought this foe pasture horses so didn't expect perfect results, but I'm thrilled with the result. I'll keep my entire herd on this product. It's amazing!

Rated 5 out of 5 stars
By Robin on Jul 23, 2025

Less flies in the horse manure.

I have tried several fly control products. I used this for the first time this season beginning in April. I can definitely see a difference in the amount of flies

I have tried several fly control products. I used this for the first time this season beginning in April. I can definitely see a difference in the amount of flies in my fields. I use this product in the whole herd.

Rated 5 out of 5 stars
By Mark on Aug 28, 2025

I think it WORKS!

Tried this, based on reviews at other sites... and I'm about 6 weeks in. Our fly problem is WAY DOWN from what it was a year ago!

Tried this, based on reviews at other sites... and I'm about 6 weeks in. Our fly problem is WAY DOWN from what it was a year ago!

Rated 5 out of 5 stars
By Catherine on Jul 22, 2025

Seems to be working!

I decided to try this product for the first time based on other reviews. It seems to be working very well on my two horses. I also have two goats, and I also have

I decided to try this product for the first time based on other reviews. It seems to be working very well on my two horses. I also have two goats, and I also have them on a feed through inhibitor.