We are currently building a barn for about 30 or so ducks and a few geese. The front half of the barn is office and storage and will be concrete, but our dilemma is the room where the birds will be. What flooring would be safest for their feet? We've always had a dirt floor (with straw bedding) in the old pen, but I'm on the fence about putting concrete throughout the new barn. Would it be okay, or is there a better solution that would be durable, easy to clean, and safe for webbed feet?