Winter is around the corner - this will be my first winter with ducks.. I need to know how you keep the duck ponds unfrozen during the winter, I am in NC so we do get some freezing temps. I will post some pics so you can see our set-up. I know for the outside of the kennel I will be putting a clear coroplast material to keep the air out but will allow sunlight in for warmth. here is the setup - (pics are older.... pen wasn't quite ready for the ducks) and last you can see the coop enclosed with the clear coroplast, it actually keeps it warmer inside pic was during snow storm - which we rarely see!!