Three replicate 4 X 4 factorial trials were conducted with growing-finishing crossbred gilts, fitted with cecal cannulas, to determine the effects of amino acid utilization, fiber and anthraquinone additions to the diet on production of odorous sulfide compounds and other odorous compounds from cecal contents, fresh manure and stored manure. Corn-soy diets compared were (1) Diet I: a standard 13% crude protein corn-soy diet with total methionine+cystine,0.47%; total lysine, 0.61%; total tryptophan, 0.12%;threonine, 0.39%; (2) Diet II: a 10% crude protein corn-soy diet with crystalline 0.36% lysine (0.6% total lysine) , 0.0% methionine (0.40% total methionine+cystine), 0.02% tryptophan (0.10% total tryptophan) and 0.1 % threonine (0.40% total threonine); (3) Diet III: Diet II with 5% cellulose and, (4) Diet IV: Diet I with anthraquinone. Pigs were fed at ad libitum with constant access to water and were housed in the Purdue Animal Sciences controlled environment building. Reducing the crude protein from 13% to 10%, adding cellulose, and supplementing with crystalline limiting amino acids reduced pH in manure by .8 to .9 units. Ammonium nitrogen was reduced 33% by protein manipulation. The lower pH and ammonium N was due to lower pH and urea N contents of urine. Ammonium and total N were reduced (75% and 60%, respectively) in stored manures with the lower crude protein and amino acid diets, with added cellulose. Total VFA in stored manures were reduced 41% with the reduced protein diets and 83% with added cellulose to diets. Reducing the protein content, supplementing with amino acids and cellulose tended to reduce dimethyl sulfide, methyl phenol and other phenols in fresh manure. In stored manure, addition of cellulose to a low crude protein diet tended to reduced dimethyl sulfide, dimethyl disulfide, carbon disulfide and phenolic componds. Addition of anthraquinone to a standard diet reduced carbon disulfide, hexane, and 2-butanone in stored manure and phenolic compounds especially methyl phenol in freshly exceted manure compared those manures from pigs fed the control diet. However, higher levels of sulfide VOC compounds were noted in stored manure from pigs fed anthraquinone. Cellulose added to a low crude protein diet supplemented with amino acids altered odors significantly in manure. Although there is evidence that anthraquinone might reduce certain VOC, additional work is needed to establish if additional anthraquinone is effective in controlling sulfur containing odors from manure.