How do you change ownership on my quarter horse's registration?

To change the ownership of your quarter horse's registration, you typically need to complete a transfer of ownership form provided by the breed registry, such as the American Quarter Horse Association (AQHA). You'll need to provide details such as the horse's registration number, the current owner's information, and the new owner's details. Both parties may need to sign the form, and there may be a fee associated with the transfer. Finally, submit the completed form and any required payment to the registry for processing.