My wife and I are having a debate over the best way to keep the goat water from freezing this winter (in Maine). She thinks heat lamps would serve two purposes heating the water and keeping the goats 'somewhat' warm. I'm thinking a heated bucket would be more practical and economical. The goat shed has 4 sides and a solid floor but has an open grated window and open vents at top of the walls so would a heat lamp really be able to heat the water, let alone warm the air temp when it is 5 below zero? This is our first winter with our two ND wethers, does anyone have experience using these devices?