Vocalizations[edit]
Purring is a rapid low pitched fluttering vibration of the larynx that occurs during the entire respiratory cycle. Kittens begin to purr a few days after birth, especially while nursing: it is thought to be part of the bonding with the mother and litter mates. It occurs with contentment and with pain, such as with labor or injury.
Other vocalizations such as meows, mews, hisses, spitting, and yowls, occur only during expiration. Hissing and spitting usually occur during heated exchanges with other animals, often just prior to an attack. Meows and mews are sometimes a friendly or engaging sound, and seem to be an attempt to encourage attention or interaction.[1] Also, meows and mews can sometimes be a sign of distress.