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- Why Do Cats Purr? By Mary
Posted by : Mary Cleia
Monday, December 1, 2014
Over the course of evolution, purring has probably offered some selective advantage to cats. Most filed species produce a "purr-like" vocalization. In domestic cats, purring is most noticeable when an animal is nursing her kittens or when humans provide social contact via petting, stroking or feeding.
Although we assume that a cat's purr is an expression of pleasure or is a means of communication with its young, perhaps the reasons for purring can be deciphered from the more stressful moments in a cat's life. Cats often purr while under duress, such as during a visit to the veterinarian or when recovering from injury. Thus, not all purring cats appear to be content or pleased with their current circumstances.
Here is the link Why do cats purr? - Scientific American