Reeder Custom Guns www.reedercustomguns.com Jack Russell Research Foundation (JRTRF)  www.jrt-reasearch.com Jack Russell Health Registry  www.jrthealthregistry.com  Jack Russell Terrier Club of America (JRTCA) www.therealjackrussell.com  is the National Breed Club and Registry for the Jack Russell Terrier in the US. The JRTCA is the largest Jack Russell Terrier club and registry in the world.