I'm looking for the best breed of duck for my circumstance. I live in a location where we can get -30 up to 100 degrees Fahrenheit, and as low as -50 wind chill with lots of snow. I would like a consistent layer, through the winter, and I would want one that lays until an older age/for a longer overall time, over one that lays in bursts and dies down at an early age. A good tempered duck, that's easily trained would be preferred, and it must live in a free range residential backyard. Looks aren't all that important, but one that isn't an eye sore would be nice. Let me know if there are any other characteristics that I should look out for. Thanks!