Many riders who have a gelding (or stallion) will have heard a disconcerting sound from the sheath area while riding, especially during trotting exercises. A quick look at the horse riding online discussions groups show that this is a common occurrence.

What Exactly Is The Sheath?

This is simply the skin layer that protects the horse’s penis; the length that the gelding or stallion has retracted his penis will determine how much air is trapped inside the sheath.

Why Does the Sheath Make a Noise?

The simple answer is ‘tension,’ which comes in different forms.