I have been caring for 9 Mallard ducks for about 2 months now. I am concerned because I believe it is turning out we only have 2 females. I have read the ratio needs to be the opposite and I fear for the hens lives. Should I be concerned? And what should/can we do? We plan on as soon as they begin flying, they will be on their own other than some feed out for them and offering a suggested open pen at night. There is a lake couple pastures away and assume they will spend their time here and there. Currently they are penned at night and roam with some supervision during the day. They are spoiled rotten! Their behavior recently seems friendly and normal. Although a couple of weeks ago we had one duck that had a bleeding feather. I cared for the injured duck inside till bleeding was no an alarm to predators and not sure if was a female at the time. Then later witnessed an aggressive duck pinching/pulling on a wing and removed a feather...no bleeding that time. I isolated the aggressive duck in an adjacent pen for a couple days (sometimes with a buddy, sometimes not). When rejoined the pack after a couple days they seem to get along fine. Just some light pinching to date. I hope the boys will behave themselves!