A tongue depressor.
He believes that if the wing be suddenly lowered by the depressor muscles, it is elevated solely by the reaction of the air.
The tongue depressor is attached to the foal by elastoplast, taped round the foal's muzzle, just behind the nostrils.
The kit consists of a tongue depressor with a piece of clear tape on the end.
The examiner will also assess the sensation capabilities of the pharynx, by stimulating the area with a wooden tongue depressor, causing a gag reflex.