An easy identification system helps the feeders at union Valley Dairy in Manitowoc, Wis., deliver the right amount of premix to the right group of animals.

The bagged protein-mineral premixes arrive at the dairy with a label identifying them as either “code blue,” “code red,” or “code pink.” The feeders know that “code red” is the heifer premix, “code blue” is for dry cows, and “code pink” is the transition-cow mix. To avoid mix-ups, the feeders measure each premix into a designated pail, which is labeled with the premix’s code name. The pails also are pre-marked by weight, so the feeders know exactly how much pre-mix they poured into the pail.