A system for use in making a ruminant feedstuff comprises a blender configured to receive a stoichiometric mixture of a fatty acid and a calcium oxide. A pump operably connected to the blender pumps the mixture from the blender. At least two mixing chambers are arranged in parallel, wherein at least one of the mixing chambers is configured to receive a flow of the mixture from the pump, and wherein each of the mixing chambers has a plurality of atomization nozzles formed on a surface thereof along at least a portion of the length of the mixing chamber. The atomization nozzles are configured to receive a measured amount of water proportional to the stoichiometric mixture therethrough. A mixer, which is removably mounted in the mixing chamber, is configured to generate turbulence in the flow of the mixture as it passes through the mixing chamber.