I have two ducks. A Pekin and a Pekin mix. This is not our first time having ducks, BUT it is my first time wintering them. I live in the Upper Peninsula of Michigan. So just a couple questions. I am putting them in our old, small chicken coop. It is abot 6' × 7' and 4' high. It is predator proof. Will the ducks walk in and out of their new house? Or will I have to put them in every night? I read to insulate the walls with hay bales, is this a good idea? There are three screen windows. I blocked two, but left the one window on the south side open for venting. It is a bit smaller than 2' ×2' . Is that too much venting for a duck? Do I have to keep feeding them duck food? Or can I feed them my chicken laying mash? The duck food is twice as expensive. Can you sex a duck? For winter I was not going to provide a pool. Is this okay? What else am I forgetting? Thanks!