A composition for improving respiratory health of companion animals, includes butyric acid as a short-chain fatty acid, propionic acid as a short-chain fatty acid, acetic acid as a short-chain fatty acid, red ginseng extract powder, Siberian gooseberry extract powder, omega-3 fatty acid, glutathione powder, chlorella powder, spirulina powder, propolis powder, plantago seed (psyllium) husk powder, zinc powder and CTF-901 as active ingredients, thereby inhibiting bronchial thickening in airway smooth muscle cells through edible feeding thus to contribute to enhancement of respiratory health.