Open mouth breathing and panting can be signs of what?

• A. Normal resting
• B. Hypothermia
• C. Dehydration
• D. Hyperthermia and stress

Answer: (D)

Open-mouth breathing and panting signal the animal is trying to shed excess heat or is under stress. Panting is a primary cooling mechanism in many mammals, so when an animal is overheated, you’ll see this behavior as it tries to lower its body temperature. Stress from handling, transport, or injury also increases metabolic heat and respiratory rate, so open-mouth breathing can accompany that stress response.

Normal resting breath is typically quiet and relaxed, without heavy panting. Hypothermia usually causes cold-seeking behavior and shivering rather than panting. Dehydration shows signs like dry mucous membranes, skin tenting, and lethargy; panting is not the classic indicator of dehydration.