Mothballs as a Cat Repellent

Written by missy zane
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Mothballs as a Cat Repellent
Mothballs are toxic to cats. (cats image by Maksym Dyachenko from

You can't teach cats to respect humans' personal property, but electronic deterrents and some plants and herbs can keep them away from off-limits areas without harming them. However, while mothballs work as a cat repellent, they're toxic to cats, other animals and birds.

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Never Safe

Even putting mothballs or mothball flakes in a coffee can with holes cut in the lid is not safe for cats. Inhaling the fumes can be as toxic as eating the mothballs.

Toxic Ingredients

Mothballs, mothball flakes and mothball cakes all contain either naphthalene or paradichlorobenzene. Although paradichlorobenzene is less dangerous than naphthalene, it still can have serious side effects for cats.

Organ Damage

Ingesting or inhaling naphthalene can cause liver, kidney and blood cell damage in cats, as well as swelling of the brain, coma and death.

Other Effects

Both naphthalene and paradichlorobenzene can cause lethargy, weakness, vomiting, diarrhoea, stomach pain, loss of appetite, behaviour changes and seizures in cats.

Instant Reaction

Clinical signs of mothball toxicity in cats can develop within minutes to hours.

Immediate Care

Cats showing signs of mothball toxicity need immediate veterinary care.

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