Cow Trainers are used in stanchion barns where they are connected to an electric fence charger to give cows a light shock when they hump to evacuate. Cows are soon "trained" and the stanchions stay much cleaner. Coburn Notched Bar Cow Trainer has a solid, hard-steel flat bar, points at a 98-degree angle and is equipped with a quick-adjust clip and insulator. Package of 5 weighs 3 lbs.