ADHHA approved stallions
As of January 1, 2014 all stallions must be evaluated at the ADHHA Keuring and achieve a minimum score In Hand and the Harness Show Test to become an ADHHA Approved Stallion.
Prior to January 1, 2014, KWPN Approved and KWPN-NA Licensed Harness Horse stallions with semen available in the US were automatically grandfathered in as ADHHA Approved Stallions.