Yes, cats are known to sleep a lot. In fact, experts say that cats will sleep 13 to 16 hours a day. That is a lot of sleep. This sleep is good for them. However, in between these bouts of sleep, a cat needs activity. Some of this activity also must include some play time. Play time will help the cat’s physical and mental well being. This includes both inside and outside cats. In fact, play time will help detour indoor cats from developing behavioral problems.