I live in Minnesota and have five full grown ducks, my wife and I both work full time and are away from home all day during the winter. (The summer isn't a dig deal because she is a teacher and spends all summer with our kids and ever growing zoo) My question is what can I do to ensure they have enough water? I have only been able to find a heated 3 gallon water tank, But they blow through that in a heart beat.(firing the summer I have a 9 gallon one I to off everyday) Any other bowls I set out are frozen pretty quickly (this morning was -9). This is our forest winter with our ducks, I placed a heat lamp in their coop and they hated it and stayed aso fat away aso they could, so I removed that. I'm not a frequent on this site so I apologize if I am asking a question that has already been asked. I did a little reading before posting and answered my other question I was going to ask. Thank you in advance.