We all know that cats like to nest in small boxes. This may be because of the small space that gives them a sense of security. Cats can sleep for 18 hours a day. Because cats are solitary animals, they need safe hiding places. Peace of mind to sleep.
In addition, it may be to keep warm, the room temperature that makes the cat feel comfortable is 14 degrees higher than the comfortable temperature of human beings. If the cat living with humans can’t sleep in the warm sunshine, then there is a warm shoe box. Come alive.