Silver Bridge Farm presents a 10-month-old, 350 lb NPA-registered Duroc boar. The Duroc breed consistently achieves the highest IMF (Intramuscular Fat / marbling) scores of any swine breed — the recog…nized gold standard for pork flavor in artisan and commercial markets alike. Champion bloodline: sire from National Barrow Show line. PRRS, Parvovirus vaccinated. Leptospirosis and Erysipelas current. Brucellosis tested negative. Semen analysis: 85% motility, 90% morphology. The #1 breed choice for pork flavor improvement in commercial AI programs.