"Read More http://www.amazon.com/gp/product/B007PYN6AU?tag=takingchances-21-20
Behlen Country AHW60 Insulated Calf Sheep or Horse Waterer with Heat
Product Features Thick styrofoam floor keeps the frost line below the waterer Urethane in the walls provides over four times the insulation of competitors models tested to -20 f Double-insulated design eliminates the possibility of stray voltage Built-in hold downs removable drain plugs and easy access doors Fully assembled ready to install 28-inch by 18-inch by 22-inch"
