Abstract: A watering apparatus for hogs, sheep, goats and the like includes a thermally insulated water storage tank, means for maintaining water at a predetermined level in the tank and a drinking device extended through the side wall of the tank below the level of the water in the tank. The drinking device has an elongated water delivery tube extended through the side wall with a normally closed valve mechanism at its inner end and a mouthpiece on its outer end. An elongated valve stem extends through the water delivery tube for operative connection with the mouthpiece. When the mouthpiece is received within the mouth of an animal and pushed inwardly, the valve mechanism is actuated to initiate a flow of water through the delivery tube and directly into the mouth of the animal.