Sentence:  Increases rate of gain and improves feed efficiency , aids in the prevention or treatment ( depending on level fed ) of the early stages of shipping fever , prevents or treats bacterial diarrhea , and aids in reducing incidence of bloat and <WSD>liver</WSD> abscesses . 
Meaning of the word marked with <WSD> tags:  large and complicated reddish-brown glandular organ located in the upper right portion of the abdominal cavity; secretes bile and functions in metabolism of protein and carbohydrate and fat; synthesizes substances involved in the clotting of the blood; synthesizes vitamin A; detoxifies poisonous substances and breaks down worn-out erythrocytes