Jun 12, 2024
Why Do Cats Purr? Meanings, Science and When to Worry
Quick answer: Cats purr to communicate contentment, to bond, to ask for attention or food, and sometimes to soothe themselves when stressed, frightened or in pain. Purring is a vibration produced by the muscles of the larynx, at roughly 25 to 150 vibrations per second.
How purring works
Researchers believe a neural oscillator in the brain sends rapid signals to the muscles in the voice box. The muscles twitch and the vocal folds vibrate as the cat breathes in and out, which creates a continuous sound.
Why cats purr
- Contentment: the most familiar reason, for example while being petted
- Bonding: kittens purr from a few days old while nursing, and the habit continues with people
- Requesting: some cats add a higher-pitched, urgent element when they want food
- Self-soothing: cats may purr at the vet or when they are anxious
- Pain or illness: purring can also happen when a cat is hurt
Does purring heal?
Some scientists have suggested that the frequency range of purring may support bone and tissue healing, but this is a hypothesis, not a proven treatment. Do not rely on purring as a sign that your cat is well.
How to read purring
Context matters. A relaxed body, soft eyes and kneading suggest contentment. A hunched posture, hiding, a lack of appetite or a purr that sounds strained suggest it is time for a vet visit.
Do all cats purr?
Domestic cats and some wild species, such as cheetahs, purr. Big cats such as lions roar instead because of differences in their larynx. Some domestic cats purr very quietly.
FAQ
Why does my cat purr when I pet them?
It is usually a sign of comfort and trust.
Why does my cat purr at the vet?
Many cats purr to calm themselves during stress.
Is a cat that never purrs unhealthy?
Not necessarily. Some cats purr quietly or rarely. Watch for other changes in behavior.
This guide is for general information only and is not a substitute for advice from a qualified veterinarian. If your pet seems unwell, contact your vet.
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