We have three Khaki Campbell ducks that we got as day old ducklings in May. We are winterizing and prepping our coop for the harsh reality that winter is on its way. We have a nipple watering system inside and out what we have wrapped with heat cable but I don't imagine the water from the watering system will be sufficient for the ducks in the winter. Their outdoor "pond" is a kiddie pool that we refill every several days. I don't know how we'd keep it ice-free in the winter. I'm looking for information about what ducks need in the winter as well as how to provide them with access to fresh water even in sub-freezing temps. What have you done? What do you recommend? Thank you!