I feed my geese and ducks a mx of turkey and game grower and scratch. The baby geese free range all day on around 3 acres. The babies are starting to show signs of angel wing. I've never had this happen with my ducks. What can I feed them? Do I take them totally off of any supplemental feeding and just let them eat grass? They must really pork out on the stuff at night to be having this problem. They are being raised by their parents,not brooded.