my ducks are going to start laying soon, but I also have a drake. Can they all eat the same food? Can I provide free choice oyster shell or will that be an issue? Can the laying ducks have maintenance ration at 16% with calcium and free range as well? Do they need laying food? what about grower- can the layers use 18% grower with oyster shell free choice? Also I have ducklings soon, can they have grower once a day and free choice maintenance ration all night? Will they be harmed if oyster shell is allowed free choice? Also is 1.8% calcium in their food too much? My drake also has a few plucked feathers on his belly/breast, why? Will this feeding plan work?