I picked up 4 straight run Mallards at TSC a month ago. 3 appear to be male (green tint on their heads and only 1 quacks). I also have 7 Khaki Campbells and 3 Pekins that are a few weeks younger than the Mallards. Will it be possible to keep the 3 males with the 11 females? The ducks have their own coop, but will range with the chickens. Thanks!