5 Common Household Substances That Can Poison Your Cat

Cats are more independent than many pets, but even the savviest feline can fall victim to dangerous household substances. In the UK, several common items found at home or in the garden pose a serious risk of poisoning to cats. Knowing these hazards and how to prevent exposure can save your cat's life.

This guide highlights the five most common household substances likely to poison your cat and offers practical tips for responsible owners to keep their feline friends safe.

1. Antifreeze (Ethylene Glycol)

Antifreeze, containing ethylene glycol, is highly toxic to cats. Unlike bitter poisons that cats avoid, antifreeze tastes sweet and can attract them. Exposure can occur if your cat drinks spills or licks antifreeze residue from their paws or fur.

Even a tiny amount (as little as 2-3 ml) can cause severe kidney damage and be fatal. Symptoms include vomiting, lethargy, increased thirst, and wobbliness, manifesting within hours. Immediate veterinary intervention, often with antidotes, is essential for survival.

Always store antifreeze securely, clean up spills promptly, and avoid using it where your cat has access.

2. Lilies (Lilium species)

Lilies are among the most dangerous household plants for cats. All parts of the plant, including pollen, are toxic and can cause fatal acute kidney failure even in tiny amounts.

Cats may not usually eat lilies, but pollen can cling to their fur, which they groom off. Because there is no safe way to keep lilies in a home with cats, it is best to choose alternative plants or flowers for your home.

If you suspect your cat has been exposed, seek immediate veterinary care as early treatment is vital.

3. Flea and Tick Products for Dogs and Inexpensive High Street Versions

Many cat owners try cheaper flea treatments or even use dog flea products, which can be extremely dangerous. Dog flea treatments often contain permethrin, which is highly toxic to cats and can cause seizures, neurological damage, or death.

Cheap over-the-counter flea products for cats, common in supermarkets or pound shops, may also contain outdated pesticides causing adverse reactions in some cats.

Always use flea and tick treatments specifically formulated for cats as recommended by your vet, ensuring their safety and effectiveness.

4. Tar-Based Liquids like Creosote

Tar-based substances such as creosote, used in wood treatment and fence painting, are toxic to cats. Although formulations have changed due to safety regulations, old creosote products are still dangerous.

If your cat gets tar or creosote on its fur and licks it during grooming, it can cause serious illness or death.

Keep these products securely stored and away from your cats' environment. Any contact warrants immediate veterinary assessment.

5. Rodenticides and Slug Pellets

Rodenticides are poisons aimed at killing mice and rats, whereas slug pellets target slugs and snails in gardens. Both are toxic to cats through direct ingestion or secondary poisoning from consuming poisoned rodents.

Poisoned rodents are often easier prey, increasing risks as cats hunt. Slug pellets contaminate soil and can be ingested when cats lick their paws.

Use these products cautiously, keep cats away from treated areas, and choose pet-safe alternatives if possible.

Common Questions

What should I do if I suspect my cat has been poisoned?

Quick Answer: Contact your vet immediately and provide details of possible toxins your cat was exposed to.

Rapid veterinary intervention increases the chance of survival, as treatments vary with different poisons. Try to keep your cat calm and avoid inducing vomiting unless advised by a professional.

How can I prevent household poisoning in cats?

Quick Answer: Store hazardous substances securely, avoid bringing toxic plants like lilies indoors, and use cat-safe flea treatments.

Regularly check your home and garden for poisons, keep your cat supervised, and be mindful of toxins in everyday products and foods. Educate all household members about these risks.

By staying vigilant and taking preventative measures, you can greatly reduce the risk of poisoning for your beloved cat.

In summary, paracetamol (though not in the original list, it's a critical poison to avoid), antifreeze, lilies, cat-unsafe flea treatments, creosote, and rodenticides/slug pellets are the top household substances to keep away from your cat in the UK in 2025.

For those interested in adopting or buying a cat, ensure you find reputable breeders or adopt from known and respected rescue organisations to promote ethical pet ownership and health.

Responsible ownership means maintaining a safe environment for your cat and being informed about hidden dangers to their wellbeing.