Cats often sleep curled up or cuddled together. It allows them to maintain the body temperature and gives a sense of comfort and safety. This is because during sleep the body of a small animal loses some heat. In order to prevent it the cat takes a nap near a heated laptop, at the radiator, in the sunniest part of the house, on a soft chair or in the owner's bed. If we have more than one pet and it gets chilly in the apartment or the yard, cats will most likely be resting cuddled together.