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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:

  • A raised lump or swelling on the skin

  • A small breathing hole in the center of the lump

  • Redness, irritation, or discharge around the site

  • Excessive licking, scratching, or biting at the area

  • 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:

  • Carefully removing the larva through the breathing hole under sterile conditions

  • Cleaning and disinfecting the wound

  • Prescribing antibiotics if there’s an infection

  • Pain relief or anti-inflammatory medication if needed

Most dogs recover quickly after the larva is removed.

Prevention Tips

  • Keep dogs away from rodent burrows, rabbit nests, and areas where botflies are common.

  • Regularly check your dog’s skin for unusual lumps, especially in summer and early fall when botflies are active.

  • 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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