Why do Labrador cats snore when they sleep? Many owners may not know that cats also snore, but it's not easy to notice unless you observe carefully. So why do cats snore?
From a scientific and medical perspective, a cat's larynx is composed of the thyroid cartilage and cricoid cartilage. The laryngeal cavity is divided into three parts: the upper part is the laryngeal vestibule, with the false vocal cords at the caudal edge. The cavity between the false and true vocal cords is the second part of the laryngeal cavity. The third part is the very narrow cavity between the vocal cords and the cartilaginous rings. A cat's purring sound is produced by the vibration of the false vocal cords, resonating through the laryngeal cavity. 
Studies have shown that both domestic and wild cats purr when injured. This purring sound, produced from the throat, helps them heal bone injuries and organ damage, and also makes them stronger.
Strictly speaking, cats aren't actually asleep when they purr, and they don't purr when playing, stressed, or truly asleep. They only purr when they feel content or relaxed and happy in their owner's lap. Generally, mild purring in a cat is nothing to worry about, but if your cat is purring constantly and exhibits other unusual behaviors, you should pay attention.
