I had been assuming that Lily was just overweight, and that was the fertility problem. Being that she is eating more grass then feed lately, I just don't think that that is a problem anymore. When they are free ranging, the feed last three times longer. Probably longer than that even, but the chickens occasionally go in there as well. LOL! I have 18 chicks that descend on the duck area whenever they think it's safe! I find that especially interesting since the ducks are in the area where I usually raise chicks.