COSCA's uniform set of rules governs all shows approved by the club. Every member has a voice as to which rules are changed and/or adopted at the annual rules meeting. As a result, classes are available for all divisions and types of horses and ponies. Any breed may show in open classes, but COSCA offers specific classes and high point awards for the following breeds:
• American Saddlebred
• Appaloosa
• Arabian/Half-Arabian/Anglo-Arabian
• Morgan
• National Show Horse
• Paint & Pinto
• Paso Fino
• Quarter Horse
• Tennessee Walking Horse
• Welsh Pony