Performance of broilers fed a broader spectrum antibiotic (virginiamycin) or a narrower spectrum antibiotic (bacitracin methylene disalicylate) over 3 consecutive grow-out cycles
Affiliation:
2. Microbial Research Inc., Ft. Collins, CO 80525;3. Statistical Services, Zoetis Animal Health Global Poultry, Durham, NC 27703;4. Colorado Quality Research, Wellington, CO 80549