Cats can be kept in a dark room, but this is not good for the cat’s physical and mental health. If the cat lives in a dark room for a long time, it may become timid, wary, and afraid of people, and the cat will not be able to get sunlight for a long time. The sun is also prone to diseases, so try not to keep your cat in a dark room for a long time. It is best to keep your cat in a ventilated and sunny room.