He was noted nationally as a breeder and owner of Holstein - Fresian cows by the Holstein - Friesian Association of America .
Zimmerman also operated a successful livestock operation that focused on raising specialty hogs and cattle .
Zimmerman was noted nationally as a breeder and owner of Holstein - Fresian cows by the Holstein - Friesian Association of America .
Zimmerman also operated a successful livestock operation that focused on raising specialty hogs and cattle .