hi. i am new and would like to ask a question. we had a Muscovy hen that was sitting on her eggs for 2 whole weeks and just left for a little wile in the morning and in the evening to eat swim etc . when she left for her break she covered the nest with her feathers. 5 days days ago she disappeared . the nest was covered with her feathers like she went to one of her breaks but one egg was broken and totally empty. (there are probably another 15 eggs there) would you know why wouldn't she come to sit anymore? are they sometimes desert their nest in the middle of brooding? thank you btw i feed the ducks near our lake with cracked corn. is there anything i can give them? we have few injured one.