As warmer weather rolls in, mosquitoes quickly become part of daily life — especially across Australia. In states like Queensland, where mosquito activity is high for much of the year, managing them is more than just a comfort issue.
For cat owners, however, mosquito control comes with an extra layer of responsibility.
Many common mosquito repellents that are safe for humans (and even dogs) can be dangerous for cats. Understanding what to avoid — and what to use instead — is key to keeping your home both mosquito-free and cat-safe.
Why Cats Are More Vulnerable to Mosquito Repellents
Cats process chemicals very differently from humans.
Unlike people and dogs, cats lack a liver enzyme called glucuronyl transferase, which is essential for breaking down many common insecticide ingredients. Without it, certain chemicals can build up in their system and become toxic.
This makes cats particularly sensitive to ingredients often found in mosquito repellents — even at low doses.
Ingredients to Be Cautious Of
⚠️ Pyrethroids (Including Pyrethrins)
Pyrethroids are widely used in mosquito coils, mats, sprays and liquid vapourisers. They include:
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Permethrin
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Cypermethrin
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Deltamethrin
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Natural pyrethrins (derived from chrysanthemum flowers)
While generally safe for humans, pyrethroids are highly toxic to cats. Even small exposures — such as skin contact or inhalation — can cause serious symptoms including:
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Tremors
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Excessive salivation
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Loss of coordination
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Seizures
Veterinary studies show that exposure to concentrated pyrethroids can be life-threatening for cats. For this reason, it’s best to avoid pyrethroid-based mosquito products altogether in cat households.
🌿 Plant-Based Repellents & Essential Oils
“Natural” doesn’t always mean “cat-safe”.
Many plant-based repellents rely on essential oils such as:
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Citronella
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Eucalyptus
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Lemongrass
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Lavender
While these are commonly used by humans, cats may struggle to metabolise certain compounds found in essential oils. Direct exposure, ingestion or prolonged inhalation can be harmful.
What to do instead:
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Avoid applying essential oil repellents on or near your cat
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Use them only in outdoor or well-ventilated areas your cat cannot access
🚫 DEET
DEET is one of the most effective mosquito repellents for humans — but it’s not recommended around cats.
There have been reports of toxicity in pets, and organisations such as the ASPCA advise avoiding DEET products in homes with animals. Cats can absorb DEET through their skin or ingest it during grooming.
❓ Icaridin (Picaridin)
Icaridin is often marketed as a safer alternative to DEET and is widely used in Australia.
While current data suggests low toxicity in humans, there is limited research on its safety for cats. As a precaution:
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Do not apply directly to cats
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Prevent cats from contacting treated skin or surfaces
When it comes to cats, caution is always the safer choice.
Mosquito Coils, Mats & Vapourisers
Many coils and plug-in repellents contain pyrethroids and release airborne chemicals or smoke.
These can:
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Irritate a cat’s respiratory system
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Build up in enclosed indoor spaces
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Increase exposure over time
For cat households, it’s best to avoid using these products indoors, especially in areas where your cat sleeps or spends most of their time.
Safer Ways to Protect Cats from Mosquitoes
While chemical repellents are risky, there are effective cat-friendly alternatives:
✔️ Mosquito-Proof Your Home
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Repair window and door screens
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Seal gaps where insects can enter
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Remove standing water around your home
✔️ Improve Airflow
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Use fans indoors — mosquitoes are weak flyers
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Keep rooms well ventilated
✔️ Create a Safe Space
Designate a screened or well-sealed area where your cat can relax without exposure
✔️ Talk to Your Vet
Your veterinarian can recommend cat-specific solutions based on your cat’s age, health and lifestyle.
A Calm, Comfortable Home Matters
At Tofu Cat Litter Australia, we believe a healthy home starts with understanding your cat’s natural sensitivities — whether it’s litter, scents, or environmental chemicals.
Cats thrive in:
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Low-stress environments
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Clean air
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Minimal artificial fragrance
Making thoughtful choices — from mosquito control to everyday products — helps keep your cat comfortable, confident and safe at home.
Final Thoughts
Mosquitoes are an unavoidable part of Australian life, but exposing your cat to harmful repellents doesn’t have to be.
By avoiding high-risk ingredients, choosing cat-safe alternatives, and focusing on prevention, you can protect your feline companion without compromising their health.
When in doubt, always consult your veterinarian — and remember that what’s safe for humans isn’t always safe for cats.
Disclaimer:
This article is for educational purposes only and does not replace professional veterinary advice. Always consult your veterinarian for personalised guidance regarding your cat’s health.