What happens when a cat sleeps in a ball

There are many reasons why cats sleep in a ball: it may be due to the cold, protecting themselves, sleeping habits, etc. Firstly, when cats sleep, their body temperature becomes slightly cooler and they can huddle up better to protect themselves from the cold, especially in winter when cats prefer to sleep in a huddle. Secondly, a cat is an insecure animal with a sensitive abdomen and it feels that it can better protect itself by huddling up in a ball when it sleeps. Or the cat has just changed to an unfamiliar environment. Such a posture is a kind of resistance to the unfamiliar environment, strangers, shrink into a ball and feel safer. In addition, one of the sleeping positions. There are many sleeping positions for cats, so as long as they do not affect their health, there is nothing to worry about.