A: Horses often yawn when they are drowsy, hungry, or stressed. Pain is one source of stress, but anything that increases arousal—including physical discomfort, fear, excitement, or mental challenge—can induce yawning. Physiologically, yawning is a response linked to increased cortisol levels, elevated body temperature (called the “brain cooling” theory of yawning), or gastrointestinal discomfort.
Yawning is an involuntary
Create a free account with TheHorse.com to view this content.
TheHorse.com is home to thousands of free articles about horse health care. In order to access some of our exclusive free content, you must be signed into TheHorse.com. Start your free account today!Sign UpAlready have an account?