Keeping flies off horses is a common concern for horse owners during warmer months, as flies are not only a nuisance but can also pose serious health risks. Various strategies exist to protect horses, including fly sprays, gels, fly sheets, masks, boots, and stable management tools like fly traps, fans, and mesh screens. Each method has its pros and cons; for example, fly sprays are quick and affordable but may irritate sensitive horses, while fly sheets provide all-day protection without chemicals but require proper fitting. Combining several approaches often yields the best results in minimizing fly irritation.

The importance of controlling flies extends beyond comfort, as flies can transmit several dangerous diseases such as Potomac horse fever, pigeon fever, equine infectious anemia, vesicular stomatitis, summer sores, and fly strike. These conditions can cause symptoms ranging from fever and abscesses to severe wounds and even death. Additionally, flies can cause dermatitis and allergic reactions in horses. Effective fly control not only prevents disease but also reduces stress and improves overall horse well-being.