 The National Shire Horse Spring Show is still held annually and is the largest Shire show in Great Britain . Currently , the American Livestock Breeds Conservancy considers the population of the Shire to be at " critical " levels , meaning that the estimated global population of the breed is less than 2 @,@ 000 and fewer than 200 registrations are made annually in the US . The UK Rare Breeds Survival Trust considers the breed to be " at risk " , meaning that population numbers are estimated to be under 1 @,@ 500 . The Equus Survival Trust considers the breed to be " vulnerable " , meaning that between 500 and 1500 active adult breeding mares are in existence today . 
