👉 Purring is a sound that can be described as a low, resonant, and often repetitive whining or moaning. It is typically associated with pets like cats, dogs, and even some birds. The purr has been observed in various species of animals, including humans, but it is most commonly associated with cats. Purring is not usually considered to be a sign of aggression or distress; rather, it is often used as a form of communication between individuals or groups of animals.