The reasons why the cat’s belly keeps vibrating are as follows:

1. It may be that the kitten will be nervous, anxious, and stressed when it first arrives in a new environment, which will cause bowel sounds. At this time, the kitten needs to be comforted and allowed to adapt to the new environment.

2. It may be that the weather is cold and the environment the cat is in is not warm enough. The cat will vibrate all over due to the cold.

3. The kitten may have indigestion. You can feed the kitten some probiotics to condition the intestines. If the kitten does not improve for a long time, it is best to send it to a pet hospital for examination and treatment.