Cats purr for a variety of reasons, not just when they are happy. Purring is a natural calming instinct that cats use to self-soothe in stressful situations, such as when they are scared or injured. However, cats also purr when they are content and happy, and it is a way for them to communicate with their owners and other cats. Some common reasons why cats purr include:

• Happiness: If your cat looks relaxed, with half-closed eyes and a mostly still tail, and is purring, its safe to assume they are in a pleasant mood.

• Hunger or wanting something: Cats may purr when its mealtime and theyre hungry. When purring for food, they combine their normal purr with a "mew".

• Kitten-mother bond: Kittens can purr at only a few days old, and it is a way for them to communicate and bond with their mothers. Mother cats also use purring as a lullaby.

• Stress relief: Cats may purr in stressful situations, such as when visiting the vet, as a way to self-soothe and calm down.

• Communication: Cats may purr to communicate with their owners or other cats, such as to solicit food or attention, or to communicate appeasement.

While it can be difficult to know exactly what your cat is trying to communicate when they purr, considering the situation and your cats body language can help you make an informed guess.