I need to put a trough heater on my big mares water trough next week. I will have to use a 100ft and a 20ft heavy duty extension cord (electrical taped at the connection). What do you guys think? Its the only way her water will get heated, it won't be running in the field and I will put it up on t-posts to keep it off the ground. Might even get some pipe insulation to keep it from getting brittle and freezing. I have 200amp service in my barn and it'll be the only thing hooked up aside from my fencer. ALSO, how much energy/how much do you pay to run a stock tank heater for a 100gallon tank? Anyone have any suggestions for my pony mares water? Her field is too far from the barn to run extension cords and I can't move her closer until spring because we started digging for the other run-in shed and the ground froze on us so theres 4 huge holes in the ground (and plus, that field is still too far away). She has a muck bucket as her water tank and so far it hasn't been doing badly. She hasn't been drinking much and eats snow sometimes. Would molasses and hot water help make her water more enticing? We do this with our goats and it really works. How about electrolytes in the water? We were thinking of boxing her bucket in with plywood and insulating it and giving it an insulated lid of plywood with a hole big enough for her nose in the middle of it. Would this work to keep it from freezing too often? Do you think she'd drink from this?