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The Daily Insight

Will having a cat deter mice

Author

Andrew Walker

Updated on April 15, 2026

Cats emit a chemical that deters mice away from your home, this chemical can be found in your pet’s saliva, which triggers the sensory organs inside a mouse and causes terror. Even if your cat is not a killing machine, they will be able to passively defend your home.

Will mice Stay away if you have cats?

Will mice stay away if you have cats? If they’re smart, yes. Mice know cats are in your home because they can smell their predators. The mere whiff of cat urine and litter is often enough to scare the mice away.

Can cats smell mice through walls?

Cats possess superior senses, namely smell, that help them to detect rats, mice and other rodents in your home. … This organ benefits a cat by allowing it to more acutely smell potential prey, including rats or mice inside of your home.

Do mice avoid places with cats?

While cats might be able to keep mice out of your living space, that doesn’t mean they have left your home. Cats often don’t have access to the areas where the mice are nesting like the basement, attic, walls or crawlspaces. Mice will quickly learn that they can avoid the cat by traveling through the walls.

Can cats hear mice in walls?

Cats can hear a mouse squeaking underground or a cockroach scurrying inside the wall. Their amazing ears enable them to locate their prey by sound—something most people forget when they’re playing with their cat and offer no auditory stimulation.