They needn’t spend endless hours grazing or foraging the way large herbivores do. So, just how much sleep does a wild cat get? Anywhere from 16 to 20 hours a day, typically. For very young and very old cats, it’s near the upper end of the range, and newborns sleep almost 24/7. While cats do spend at least two-thirds of their lives asleep, they’re not “asleep” in quite the same way humans are.