The low toned rumbling of a purring cat is a familiar sound and a comforting part of a happy home for their owners. A curled up cat sat purring on their lap is how lots of cat owners relax. Many people assume a purring cat is a happy animal, but that is not always the case. There are several reasons a cat might purr. By watching what other behaviors a cat exhibits you can understand the cause of kitty's purring, and if there is a cause for any concern.


1. How Cats Purr

Scientists used to think cat purring was due to vibrations in their hearts. And if you have felt a cat as it purrs you can see why they thought this, the purring rumble does seem to come from a cat’s chest. We now know purrs come from the cat’s larynx in the throat. Air vibrates every time the cat breathes in or out at 25 to 150 vibrations per second. This makes a purring sound.

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