How?? Well its either a shetland that had minaiture papers that it was born with or its a shetland that was hardshipped AMHA because it stayed 34" or under. I know of about 5 triple registered horses. AMHA/AMHR/ASPC
Keep in mind that miniatures were bred down from shetlands. Some people threw away the shetland papers and some kept them. So sometimes you see much older stock that has both amha and aspc papers