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Are fipronil flea treatments toxic to rabbits?

Toxic for rabbits

Never use fipronil flea products on rabbits. Merck says fipronil can cause severe nervous system problems and death in rabbits, and Pet Poison Helpline and House Rabbit Society warn against it. Source: Merck Veterinary Manual, Pet Poison Helpline, House Rabbit Society

Conditions

Risks and signs

  • Pet Poison Helpline lists trouble walking, muscle tremors and seizures after it is swallowed or put on the skin. Source: Pet Poison Helpline

Why it is a problem

  • A product sold for dogs and cats can still harm rabbits: House Rabbit Society links fipronil to nervous system damage and death in rabbits. Source: House Rabbit Society

Sources

  1. Merck Veterinary Manual: Illness of Rabbits (opens in a new tab)

    “The flea product fipronil should not be used in rabbits because it can cause severe nervous system problems and death.”

    Read on 10 October 2026

  2. Pet Poison Helpline: Dangers In Your Home To Your Rabbit (opens in a new tab)

    “Specifically avoid any product containing Fipronil.”

    Read on 10 October 2026

  3. Pet Poison Helpline: Dangers In Your Home To Your Rabbit (opens in a new tab)

    “Oral or dermal application can cause life threatening symptoms including: trouble walking, muscle tremors, and seizures.”

    Read on 10 October 2026

  4. Pet Poison Helpline: Dangers In Your Home To Your Rabbit (opens in a new tab)

    “Always check with your Veterinarian prior to applying any topical flea & tick product.”

    Read on 10 October 2026

  5. House Rabbit Society: National Pet Poison Prevention Week (opens in a new tab)

    “Frontline (fipronil) has been linked to neurological damage and death in rabbits, although this product is apparently safe for dogs and cats.”

    Read on 10 October 2026

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