By Gail Ellis STILLWATER, Okla. – From county jackpots to statewide shows, Oklahoma’s youth livestock arena is competitive and fun, but animal health is a priority. Not all 4-H and FFA exhibitors can bring home a grand champion ribbon, but they’re still winners when sound biosecurity measures protect livestock from viruses and infectious disease. The public’s awareness of illness and proper hygiene has grown during the past two years, and animal health is no…