TL;DR: Fly strike occurs when biting flies cause painful, crusty sores on a dog's ear tips. While not a life-threatening emergency, it requires veterinary attention to prevent secondary infections and permanent scarring.
What exactly is fly strike on my dog's ears and how does it happen?
Fly strike, technically known as fly strike dermatitis, occurs when biting flies—most commonly stable flies—repeatedly attack the thin skin on the tips of a dog's ears. These flies bite the skin to feed on blood, causing small, painful sores that often crust over with dark, bloody scabs. This condition is frequently seen in dogs that spend significant time outdoors during warmer months.
Is fly strike on my dog's ears considered a medical emergency?
- The urgency level for fly strike is Low; while uncomfortable and irritating, it is not a life-threatening emergency.
- If left untreated, sores can attract more flies, lead to secondary bacterial infections, or cause permanent scarring and thickening of the ear margins.
- You should schedule a routine veterinary appointment to receive proper medicated ointments and repellent recommendations.
How does sending a photo help a vet triage my dog's ear condition?
- A visual assessment allows a veterinary professional to confirm if the lesions are fly bites or signs of other conditions like ear margin vasculitis or sarcoptic mange.
- Close-up, well-lit images help determine the severity of the inflammation.
- Photos enable the vet to provide immediate home-care advice to protect the ears until you can attend an appointment.
Clinical Context (Merck Veterinary Manual)
In dogs, fly strike (myiasis) necessitates immediate veterinary intervention. Clinically, the hair coat surrounding the affected area, such as the ear tips, should be clipped to assess the lesion's extent and remove larvae. Manual removal of larvae from tissue pockets may require sedation or anesthesia. Subsequent daily examination is crucial due to asynchronous hatching of larvae from eggs laid in the wound. Treatment involves removing as many larvae as possible and killing them to prevent pupation. All wounds should be properly dressed, and elective surgical procedures should be performed with careful attention to antisepsis.
Chapter: Parasitology, Dermatology, Emergency
Source: The Merck Veterinary Manual, 11th Edition (Page 898)