A cat sleeping very hard means that it has entered deep sleep, that is, a deep sleep, which is a very normal phenomenon. Cats normally sleep for more than 16 hours a day, but only about 4 hours are deep sleep, and the rest are shallow sleep. sleep. Therefore, it is best not to disturb the cat when it is sleeping deeply. If the cat is sleeping, you can play with it as you like, which means that it trusts you more.