In April, 1921, The American Kerry and Dexter Cattle Club published Volume 1 of their herd book. Although both Kerry cattle and Dexter cattle are published in this book, the two types of cattle are separated into two separate breeds with different breed descriptions for each. This is the first record of Dexter cattle registrations in the United States. In 1957, the name American Kerry and Dexter Club was changed to the American Dexter Cattle Association. This began the formal recognition of the ADCA as a national association dedicated to the preservation of Dexter cattle and tasked with keeping a record of purebred Dexter cattle pedigrees.