Sentence:  Increases rate of gain and improves feed efficiency , aids in the prevention or treatment ( depending on level fed ) of the early stages of <WSD>shipping</WSD> fever , prevents or treats bacterial diarrhea , and aids in reducing incidence of bloat and liver abscesses . 
Meaning of the word marked with <WSD> tags:  a deadly form of septicemia in cattle and sheep; involves high fever and pneumonia; contracted under conditions of exposure or exhaustion (as often happens when the animals are shipped to market)