The reasons why kittens always meow are as follows: 1. The kitten will scream for a while after leaving its mother cat and changing the new environment, and will stop when it adapts; 2. The kitten will pass continuously when it lacks food and water. The cat will bark to remind the owner; 3. The cat will bark after being frightened and stimulated by the outside world. At this time, the owner should comfort the cat; 4. The female cat will bark very much during the estrus period, especially at night.