Abstract: A method for producing animal feed comprises the steps of introducing water into a boiler; boiling the water to create steam; collecting the steam and directing it out of the boiler; injecting a moisturizer into the steam after the steam has exited the boiler to create a steam/moisturizer mixture; feeding grains into a steam chest; applying the steam/moisturizer mixture to the grains in the steam chest to create a grain mixture; and forming the grain mixture into animal feed pieces of a desired shape and size. By injecting the moisturizer into the steam after the steam has exited the boiler instead of mixing the conditioner with water introduced into the boiler, none of the moisturizer is lost in the boiler. Moreover, injecting the moisturizer in this manner achieves better steam/moisturizer mixing and allows an operator to precisely and instantaneously control the amount of moisturizer added to the steam. This produces animal feed with a more uniform size and shape and better consistency.