Animal Training: Simply remove all available water, then show the installed Water Nipple to the animal(s) by moving the nipple control and letting water trickle out. Most animals will immediately start sniffing, nuzzling and licking the hollow water-filled nipple control and learn to drink from it. If not, wait until thirsty and demonstrate again. During the waiting period leave the nipple loosely attached so water will seep past the threads and slowly drip. The dripping water will attract the animal(s) back to the Nipple for self training. Tighten securely when training is assured.