Kittens purr because they are in a good mood, want their owners to approach and caress them, relax and other factors.

1. They are in a good mood and feel very happy. The purring sound produced by cats is caused by the vibration of the false vocal cords, which resonates through the throat cavity and makes a sound. Cats will make this light purring sound when they feel satisfied, excited, and relaxed. ​​​​​​

2. It wants its owner to get close to it and pet it. When a cat wants its owner to play with it or to show that it is happy and satisfied, it will purr to attract the owner's attention, and it will be very lively and loud. When a cat sleeps next to its owner or is intimate with its owner, it is often heard purring continuously.

3. They are very comfortable. When the owner massages it, it makes a purring sound, which means that it likes the massage and feels very comfortable, and encourages the owner to continue doing so.

4. They like someone or something very much, and some cats will purr as long as they cuddle up next to their owners.

5. Sometimes when stretching its limbs and being very lazy, it will make a grunting sound.

6. When it is sick or in pain, it will also purr. If a kitten or a big cat keeps purring no matter what the circumstances, it may be due to a respiratory infection virus.