Im really worried about my girls and need help!! I have four almost 2 yr old runner ducks. They are completely free range one our 11 are farm and share a 1/2 acre pond with catfish, and bass. I do call them into a small coop at night and lock them in. When they started laying, they all layed beautiful perfect eggs almost daily and we were being overrun with eggs. then 2 of them decided they wanted to be mamas on the same nest in the coop ( notice I didnt mention anything about having a drake). I didnt have the heart to tell them about the birds and bees so I sent away for fertile eggs. They seemed to share the nest fairly well but eventually eggs started disappearing until we were down to 2, which hatched. One hen was aggressively mama and the other one sat back and observed. Mama never showed any signs of agression to the babies but also never tried to mother them either. I dont know why but neither baby made it :-( . Anyway shortly after that their egg production sharted dropping , and every once in a while I would find an egg with a "paper" shell. Now Im down to one egg a day if Im lucky and I might see a paper egg floating in the pond or broken somewhere once in a while. I have also noticed even though they all seem to eat well, and have high energy, three of them have lost weight. They used to be on Purina flock raiser, scratch, wormies and peas until they started worrying me (about a month ago) and I read something somewhere that made me switch them to a diet of wheat, fed under water, water fowl feed and I still give them their wormies and peas. Any Ideas what is happening to them?? Please Help!