Registries for the breed include the Texas Longhorn Breeders Association of America, founded in 1964 by the Kerr County rancher Charles Schreiner, III; the International Texas Longhorn Association, and the Cattlemenâs Texas Longhorn Registry.egistries for the breed include the Texas Longhorn Breeders Association of America, founded in 1964 by the Kerr County rancher Charles Schreiner, III; the International Texas Longhorn Association, and the Cattlemenâs Texas Longhorn Registry.