Horses and mules can only breathe through their nose

Correct answer: True

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Timoteo
Timoteo
Player #126126, horses are also considered obligate nasal breathers. The term is more accurate in horses, because their normal anatomyprevents them from breathing orally. The epiglottis rests above the soft palate while the animal is not swallowing, forming an airtight seal. Oral breathing can only occur with significant anatomical abnormalities or pathological conditions... wikipedia