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Section: Overview
Panting is rapid, shallow respirations characterized by open-mouthed breathing, often accompanied by a protrusion of the tongue. It is seen commonly in dogs, and less commonly in cats. A dog's primary method of cooling is evaporative cooling from the respiratory tract through panting. When a dog pants it provides increased air flow over moist surfaces in the upper respiratory tract through rapid, shallow breathing. The increase in air flow causes an increase in evaporation from the upper respiratory tract. At the onset of panting, respiration rate increases rather suddenly from around 30-40 respirations per minute to around 300-400 respirations per minute. Under a moderate heat load a dog alternates between brief periods of panting at high frequencies and periods of normal slow respiration.Panting may also be the result of other factors, such as fear, stress or disease.
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