When a newborn calf is moved into its individual pen in the calf barn at Endres Jazzy Jerseys, it is not ear tagged immediately. In order to keep calves correctly identified at the Lodi, Wis., farm, a piece of duct tape is placed above the new calf’s pen. On that piece of tape, they write the calf’s identification, birthdate, dam’s name, whether it’s a heifer or bull, and who fed the calf colostrum and brought it to the calf barn. This system allows them to clearly and easily track each animal in the calf barn.