 House cats have a pretty great life, all things considered. They needn't worry about hunting down their next meal, they get on demand attention, and they sleep, a lot. Perhaps too much? If you're worried about your feline friend sleeping the day away, don't fret. It's normal, and a good reminder we should all probably be getting better sleep. Cats need a lot of sleep so they can conserve energy for hunting activities such as stalking, chasing, pouncing, climbing, and running, she says. But cats can also sleep for a reason that's entirely relatable to humans, for boredom or mental health reasons.