Growth and Meat Yield Responses of Male Broilers Provided Feeds Subjected to Postmix Grinding During a 41-Day Production Period

Abstract

Pellet quality influences cumulative BW and feed conversion of meat birds. Particle size reduction of grain affects the integrity of pellets. Postmix grinding is a feed manufacturing process used to improve particle size uniformity. This procedure grinds all the ingredients after mixing but before the diet enters the pellet mill. This study evaluated the effects of postmix grinding on pelleting parameters and live performance responses and processing yields of male broilers. Two treatments were used: 1) control feed that was manufactured under standard procedures and 2) feed subjected to postmix grinding prior to the conditioning and pelleting process. All feeds were manufactured in a commercial mill. Feed subjected to postmix grinding had improved pellet durability index and a greater percentage of pellets than feed manufactured with conventional grinding. Broilers provided feed subjected to postmix grinding consumed less feed and had improved feed conversion, but the amounts of carcass parts were similar between treatments. Future research should determine if postmix grinding is economically feasible based on improved live performance responses of broilers vs. energy usage incurred with operating postgrinders.