Individual and combined effects of phytase and butyric acid on performance and processing yield of YPM x Ross 708 male broilers reared to 42 days of age
                            
                            
		
                                
	Joseph P. Gulizia*1GS, Jose I. Vargas 1, Susan M. Bonilla 1, Jose R. Hernandez 1, Sureerat Thuekeaw 2, Ruediger Hauck 1,3, Ken Macklin 1, William A. Dozier, III 1, Klint W. McCafferty 4, Wilmer J. Pacheco 1 / 1 Department of Poultry Science, Auburn University, 2 Department of Animal Husbandry, Faculty Veterinary Science, Chulalongkorn University, 3 Department of Pathobiology, Auburn University, 4 USDA-ARS Poultry Research Unit