Dog Botfly: What Pet Owners Need to Know
Finding a strange bump on your dog can be alarming—especially if it turns out to be a botfly larva. Botflies (Cuterebra species) are parasites that affect dogs, cats, rabbits, and other mammals. While the thought of a larva living under your pet’s skin may sound unsettling, knowing how to recognize, treat, and prevent botfly infestations can help keep your dog safe.
What Is a Botfly?
Botflies are insects that lay eggs near animal burrows, tall grass, or areas where pets roam. When a curious dog sniffs or brushes against the area, the tiny larvae can attach to the skin and burrow into it. Once inside, the larva creates a small hole in the skin to breathe and continues to grow.
Symptoms of Botfly in Dogs
If your dog has a botfly larva (also called a warble), you may notice:
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A raised lump or swelling on the skin
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A small breathing hole in the center of the lump
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Redness, irritation, or discharge around the site
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Excessive licking, scratching, or biting at the area
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Signs of discomfort or pain when the lump is touched
How Is a Botfly Treated?
Do not attempt to squeeze or remove the larva at home. Doing so can cause the larva to rupture, leading to severe infection.
Treatment should be done by a veterinarian and may include:
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Carefully removing the larva through the breathing hole under sterile conditions
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Cleaning and disinfecting the wound
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Prescribing antibiotics if there’s an infection
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Pain relief or anti-inflammatory medication if needed
Most dogs recover quickly after the larva is removed.
Prevention Tips
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Keep dogs away from rodent burrows, rabbit nests, and areas where botflies are common.
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Regularly check your dog’s skin for unusual lumps, especially in summer and early fall when botflies are active.
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Keep your yard trimmed and reduce exposure to wild animal habitats.
When to See a Vet
If you notice a lump with a small hole in it—or if your dog is persistently licking or scratching at one spot—schedule a vet visit immediately. Early treatment prevents complications and discomfort.
✅ Bottom line: A dog botfly infestation looks like a lump with a breathing hole and requires veterinary care for safe removal. With proper treatment and prevention, your dog can recover quickly and avoid future infestations.
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