You have all been very helpful, so, once again, I am asking for some advice... We have two ducks, which we bought this past May as day old Blue Swedish/Pekin cross ducklings, and are more than likely brother and sister, and soon to be mother and father...She's been laying eggs for the past three weeks, and there are maybe 10 eggs in her nest. They mate often, too. So, are they more than likely fertilized? And if so, when the ducklings hatch, what should I do with all the offspring? Sell them? Will people buy ducklings in the winter? We are new to this. They have a big "stable" like room, with lots of bedding, but no heat. Should we supply some heat? We are in northern PA, and we get some very cold nights. Any help appreciated...Thanks!