The American Appendix Horse Association (AAHA) registers the Appendix horse which is a Quarter Horse and Thoroughbred cross. Paints ( APHA or The American Paint Horse Association) with Thoroughbred in bloodline are welcome. Breeding Stock Paints are welcome to register without prejudice to lack of color. This is not a color breed. Horses that are 'X coded in AQHA (American Quarter Horse Association) are welcome. This way you can breed your 'X coded to a 'X coded and register the offspring as Appendix. If you enjoy eventing such as barrel racing, trail riding (endurance, pleasure, mileage/hourly or working ranch), hunter/jumper, dressage, cutting, ranch work or horse racing, you will want to register your horse into this association as Appendix and apply for a Performance Card to earn end of the year points. American Appendix Horse Association P.O. Box 1156, Salmon, Idaho 83467 Phone: 208-756-1394