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Top 5 Feed-Through Insect Control Solutions for Horses in Canada (2025) — Veterinarian-Recommended Options to Reduce Flies and Improve Stable Comfort

Published on Thursday, August 21, 2025

Feed-through insect control for horses refers to oral additives and feed-through products that pass through the digestive tract and act on fly larvae in manure, breaking the lifecycle and lowering stable fly populations. These products are attractive to Canadian horse owners because they are low-maintenance, integrate with regular rations, reduce the need for frequent topical applications, and support broader manure-management strategies. In Canada, seasonal fly pressure, provincial regulations, and an emphasis on animal welfare and environmental stewardship shape consumer preferences: buyers seek safe, palatable formulations that work in a range of climates and bedding systems, are compatible with existing feed programs, and fit into integrated pest management (IPM) plans alongside sanitation and physical controls.

Quick Menu

1. Best Value

2. Best IGR Specialist

3. Best For Herd Management

4. Best Premium Formulation

5. Best Natural Option

1
BEST VALUE

Farnam SimpliFly Feed-Thru Fly Control

Farnam SimpliFly Feed-Thru Fly Control

Farnam SimpliFly is a widely available feed-through fly control product positioned as a reliable, economical option for horse owners who need consistent manure-based fly suppression. It holds market-leader status because of Farnam's broad distribution and long track record in equine pest products, making it easier to source and often priced competitively versus specialty brands. Compared with the other entries on this list it emphasizes accessibility and straightforward feed-through IGR action rather than niche formulation or complementary nutritional benefits.

4.2
★★★★☆
  • Stops larvae

  • Low-maintenance feed

  • Stops larvae

  • Low-maintenance feed

Review Summary

83%

"Users commonly report a noticeable reduction in fly larvae and fewer adult flies within 2–3 weeks; effective under moderate fly pressure but less reliable alone in very heavy infestations. Generally praised as cost-effective and easy to feed when used consistently."

  • Smells barn-friendly

  • Popular, widely available feed‑through formula for consistent fly control when fed daily

  • Smells barn-friendly

  • Popular, widely available feed‑through formula for consistent fly control when fed daily

Increased Safety & Security

Time-Saving Convenience

Recreational Enjoyment

Farnam SimpliFly is a widely available feed-through fly control product positioned as a reliable, economical option for horse owners who need consistent manure-based fly suppression. It holds market-leader status because of Farnam's broad distribution and long track record in equine pest products, making it easier to source and often priced competitively versus specialty brands. Compared with the other entries on this list it emphasizes accessibility and straightforward feed-through IGR action rather than niche formulation or complementary nutritional benefits.

  • Stops larvae

  • Low-maintenance feed

  • Smells barn-friendly

  • Popular, widely available feed‑through formula for consistent fly control when fed daily

  • Works via treated manure to interrupt the fly life cycle and reduce larvae survival

  • Stops larvae

  • Low-maintenance feed

  • Smells barn-friendly

  • Popular, widely available feed‑through formula for consistent fly control when fed daily

  • Works via treated manure to interrupt the fly life cycle and reduce larvae survival

Order Now

$35-70 CAD

2
BEST IGR SPECIALIST

Solitude IGR Feed-Through Fly Preventative

Solitude IGR Feed-Through Fly Preventative

Solitude IGR is presented as a best-in-class feed-through fly preventative that focuses on strong insect growth regulation and long residual activity to stop fly development in manure. It is often chosen by users looking for targeted efficacy and prolonged control, trading a slightly higher per-unit cost for perceived superior performance versus mass-market options like SimpliFly. Against nutritional or natural alternatives on this list, Solitude is technically focused on IGR chemistry rather than combined feed or herbal approaches, making it a go-to where strict fly lifecycle interruption is the priority.

3.9
★★★☆☆
  • Interrupts lifecycle

  • Easy daily mix

  • Interrupts lifecycle

  • Easy daily mix

Review Summary

79%

"Owners say Solitude IGR reliably interrupts fly development and reduces breeding when fed consistently, though it does not kill adult flies and takes several weeks to show effects. Works well as part of an integrated program but can be limited under extreme fly pressure."

  • IGR-powered boost

  • Focuses on insect growth regulation to prevent larval development in manure

  • IGR-powered boost

  • Focuses on insect growth regulation to prevent larval development in manure

Increased Safety & Security

Time-Saving Convenience

Solitude IGR is presented as a best-in-class feed-through fly preventative that focuses on strong insect growth regulation and long residual activity to stop fly development in manure. It is often chosen by users looking for targeted efficacy and prolonged control, trading a slightly higher per-unit cost for perceived superior performance versus mass-market options like SimpliFly. Against nutritional or natural alternatives on this list, Solitude is technically focused on IGR chemistry rather than combined feed or herbal approaches, making it a go-to where strict fly lifecycle interruption is the priority.

  • Interrupts lifecycle

  • Easy daily mix

  • IGR-powered boost

  • Focuses on insect growth regulation to prevent larval development in manure

  • Intended as a daily feed additive for continuous season‑long control

  • Interrupts lifecycle

  • Easy daily mix

  • IGR-powered boost

  • Focuses on insect growth regulation to prevent larval development in manure

  • Intended as a daily feed additive for continuous season‑long control

Order Now

$50-120 CAD

3
BEST FOR HERD MANAGEMENT

Purina Fly Stoppers

Purina Fly Stoppers

Purina Fly Stoppers leverages Purina's livestock nutrition reputation to offer a feed-integrated fly control solution that fits naturally into a managed feeding program for horses. Its financial advantage is the convenience of bundling pest control with established feed lines and the reassurance of a major animal nutrition company's quality systems, though it may be less specialized strictly as an IGR compared with dedicated products like Solitude. Compared to smaller specialty makers it scores for distribution and program integration, while those seeking the most aggressive IGR chemistry may prefer other entries.

3.6
★★★☆☆
  • Trusted brand stamp

  • Horse-approved taste

  • Trusted brand stamp

  • Horse-approved taste

Review Summary

72%

"Many users find Purina Fly Stoppers palatable and helpful in reducing manure-breeding flies, but several report inconsistent results and only modest reductions unless combined with other control methods. Good for maintenance-level control rather than heavy infestations."

  • Fast results

  • Formulated by a major equine feed company for easy integration into herd feeding routines

  • Fast results

  • Formulated by a major equine feed company for easy integration into herd feeding routines

Increased Safety & Security

Recreational Enjoyment

Purina Fly Stoppers leverages Purina's livestock nutrition reputation to offer a feed-integrated fly control solution that fits naturally into a managed feeding program for horses. Its financial advantage is the convenience of bundling pest control with established feed lines and the reassurance of a major animal nutrition company's quality systems, though it may be less specialized strictly as an IGR compared with dedicated products like Solitude. Compared to smaller specialty makers it scores for distribution and program integration, while those seeking the most aggressive IGR chemistry may prefer other entries.

  • Trusted brand stamp

  • Horse-approved taste

  • Fast results

  • Formulated by a major equine feed company for easy integration into herd feeding routines

  • Pelleted/top‑dress format promotes acceptance across multiple horses

  • Trusted brand stamp

  • Horse-approved taste

  • Fast results

  • Formulated by a major equine feed company for easy integration into herd feeding routines

  • Pelleted/top‑dress format promotes acceptance across multiple horses

Order Now

$80-160 CAD

4
BEST PREMIUM FORMULATION

Mad Barn Fly Patrol

Mad Barn Fly Patrol
🏠 Local Product

Mad Barn Fly Patrol is a specialty equine nutrition company’s approach that combines feed-based fly control with a focus on equine-specific formulation and customer support from equine nutritionists. It is positioned as a premium, data-driven alternative to mainstream feed-throughs, appealing to owners who value tailored nutrition plans and ingredient transparency even if that can mean a higher price point than commodity products. Versus more chemically focused IGRs or bulk feed-brand options, Fly Patrol markets itself on targeted equine suitability and integration into individualized feeding strategies.

4.2
★★★★☆
  • Pelleted convenience

  • Gut-friendly formula

  • Pelleted convenience

  • Gut-friendly formula

Review Summary

84%

"Reviewers praise Mad Barn Fly Patrol for clear reductions in fly larvae and fewer adults when used continuously, with many noting quick benefits and good palatability. Some customers note a higher price and recommend combining it with sanitation and other controls for best results."

  • Pro rider favorite

  • Developed by equine nutrition specialists with attention to palatability and consistency

  • Pro rider favorite

  • Developed by equine nutrition specialists with attention to palatability and consistency

Increased Safety & Security

Time-Saving Convenience

Recreational Enjoyment

Mad Barn Fly Patrol is a specialty equine nutrition company’s approach that combines feed-based fly control with a focus on equine-specific formulation and customer support from equine nutritionists. It is positioned as a premium, data-driven alternative to mainstream feed-throughs, appealing to owners who value tailored nutrition plans and ingredient transparency even if that can mean a higher price point than commodity products. Versus more chemically focused IGRs or bulk feed-brand options, Fly Patrol markets itself on targeted equine suitability and integration into individualized feeding strategies.

  • Pelleted convenience

  • Gut-friendly formula

  • Pro rider favorite

  • Developed by equine nutrition specialists with attention to palatability and consistency

  • Designed as a daily supplement to reduce fly populations through manure treatment

  • Pelleted convenience

  • Gut-friendly formula

  • Pro rider favorite

  • Developed by equine nutrition specialists with attention to palatability and consistency

  • Designed as a daily supplement to reduce fly populations through manure treatment

Order Now

$70-140 CAD

5
BEST NATURAL OPTION

Omega Alpha Bug Check

Omega Alpha Bug Check

Omega Alpha Bug Check offers a more natural or botanical-oriented option for owners seeking feed-through or complementary insect control with fewer synthetic actives, often at a competitive price for smaller stables or budget-conscious buyers. It is differentiated by its emphasis on herbal and holistic formulations, making it attractive to those who prefer alternative approaches, though it is typically positioned as complementary rather than a direct substitute for strong IGR-based products. Compared to mainstream and specialist IGRs in this list, Bug Check's chief advantages are perceived naturalness and cost-effectiveness for adjunctive use.

4
★★★★☆
  • Compact dosing

  • Natural-lean formula

  • Compact dosing

  • Natural-lean formula

Review Summary

76%

"Customers generally report fewer larvae and reduced fly pressure after regular use of Omega Alpha Bug Check, but some see minimal change in heavy infestation situations and emphasize the need for consistent dosing. Overall seen as a helpful element of a multi-pronged control plan."

  • Vet-crafted recipe

  • Positions itself as a botanical/herbal or reduced‑synthetic feed additive alternative

  • Vet-crafted recipe

  • Positions itself as a botanical/herbal or reduced‑synthetic feed additive alternative

Increased Safety & Security

Time-Saving Convenience

Omega Alpha Bug Check offers a more natural or botanical-oriented option for owners seeking feed-through or complementary insect control with fewer synthetic actives, often at a competitive price for smaller stables or budget-conscious buyers. It is differentiated by its emphasis on herbal and holistic formulations, making it attractive to those who prefer alternative approaches, though it is typically positioned as complementary rather than a direct substitute for strong IGR-based products. Compared to mainstream and specialist IGRs in this list, Bug Check's chief advantages are perceived naturalness and cost-effectiveness for adjunctive use.

  • Compact dosing

  • Natural-lean formula

  • Vet-crafted recipe

  • Positions itself as a botanical/herbal or reduced‑synthetic feed additive alternative

  • Aims to lower fly larval development via feed administration and manure effects

  • Compact dosing

  • Natural-lean formula

  • Vet-crafted recipe

  • Positions itself as a botanical/herbal or reduced‑synthetic feed additive alternative

  • Aims to lower fly larval development via feed administration and manure effects

Order Now

$40-90 CAD

How Feed-Through Fly Control Works and What the Research Shows

Feed-through products most commonly use insect growth regulators or larvicidal actives that are passed in manure and prevent fly larvae from developing into adults. University extension trials and peer-reviewed studies across North America show that when feed-through products are used correctly and as part of an IPM program, they can substantially reduce emerging adult stable fly and house fly populations. Effectiveness depends on correct dosing, continuous coverage during fly seasons, and combining feed-throughs with sanitation, pasture rotation, and manure management. Safety profiles are generally favorable when products are used according to label directions, but users should follow provincial regulations and consult with a veterinarian about compatibility with other supplements or medications.

Mechanism: Insect growth regulators (IGRs) or larvicides interfere with larval development in manure so larvae fail to reach adulthood, interrupting the fly lifecycle.

Efficacy evidence: Extension trials and field studies report reductions in adult emergence often in the range of moderate to substantial (studies vary by product, barn conditions, and compliance).

Best practice: Continuous administration through peak fly months yields the most consistent reductions; intermittent or late starts reduce effectiveness.

Integration: Feed-throughs work best as part of IPM — combine with regular manure removal, bedding management, physical barriers, and targeted adulticides only if needed.

Safety: Many feed-through products have acceptable safety margins for horses when used as directed; check label instructions and provincial approvals for livestock feed additives.

Environmental note: By targeting larvae in situ, feed-throughs can reduce adult fly pressure with lower reliance on broad-spectrum sprays, supporting responsible insecticide stewardship.

In Canada, feed-through insect control is an increasingly popular component of practical fly management, especially for owners who want low-labor, feed-compatible options. The five products highlighted on this page — Farnam SimpliFly Feed-Thru Fly Control, Solitude IGR Feed-Through Fly Preventative, Purina Fly Stoppers, Mad Barn Fly Patrol, and Omega Alpha Bug Check — cover a range of formulations and dosing approaches. For most Canadian horse owners seeking a balance of proven performance, ease of dosing, and broad availability, Farnam SimpliFly Feed-Thru Fly Control is a solid starting choice when used as part of a comprehensive barn management plan. I hope you found what you were looking for; you can refine or expand your search using the site search or filters to compare ingredients, pricing, and provincial availability.

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