Your relationship to the person on whom you are spying matters. If that person is your child or your employee, you have a lot more leeway when it comes to monitoring their activities. If you think someone is spying on you illegally, file a report with local law enforcement so they can investigate your case.
Most cats snooze around 16 hours per day. The majority of their sleep time, however, is much shorter than the typical seven hours or so that humans average at. night. Cats tend to sleep lightly, without going into a deep sleep.
On average, dogs sleep about 14 hours a day (though large breeds may sleep more), while cats spend 15 to 20 hours snoozing (yes, be jealous). Dogs tend to nap during the day and sleep through the night, while cats get most of their shuteye during daytime hours and are most active after dark.