MultiFly® Feed-Thru Fly Control

- 30%

Our MultiFly pellets provide safe and effective fly control for your barn. Simply feed once per day to break the fly life cycle. MultiFly is made with Novaluron, which is a completely safe Insect Growth Regulator and is 99.9% effective.

As existing adult flies die off, the overall fly population is significantly reduced within 2 weeks upon feeding MultiFly. Start feeding in spring before flies begin to appear. The product should be used as part of an integrated pest management program and should be used throughout the fly season. Novaluron is not an organophosphate, and can be safely used in a pest control program for horses and their environment.


Loved by thousands of horses and their people.

Formula 707 is the trusted choice of thousands of horse owners globally. From various disciplines and all ages, our community values the special connection that horses and humans have. We prioritize the health and happiness of your horse by formulating our supplements in collaboration with experienced veterinarians. Produced in our equine-exclusive facility, our products are tested for purity and potency. With Formula 707, you're choosing proven quality for your equine partner.

This Product is Show-Safe

This product contains no ingredients that are listed as prohibited, and additionally has been used by customers in major federations without issue. (If you'd like to double check, please reach out to your respective federation!)

Real Support

Want help with your order, or have general questions? Our live, Colorado-based Customer Support team is here to answer any questions you may have. Simply email us at or call at 970-284-5575 (M-F, 8am-5pm MST). 

Customers Also Bought

A Name That's Been Trusted for Over 75 Years

When a man named John Ewing started an equine supplement called "Formula 707" in the mid-20th century, there wasn't much consideration for the benefits of feed supplements in horses.

Today, we continue his legacy with a full line of innovative products to support every horse.