I have a year old Muscovy duck who eats her own eggs and the eggs of the other ducks and when she can, gets into the chicken coop and eats chicken eggs. I'm seriously thinking this duck must go because I wold hate for her to teach this filthy habit to the others. She free ranges, gets duck crumble, and corn chopps to little heart's content. This duck has also stopped preening. She still washes in the duck pool and the pond but most of the time she's dirty. She's the only one that behaves like this. She was pushed off her nest a few weeks ago and another Momma duck hatched her nest and is raising those ducklings. Maybe that sent her into a tail spin. I don't know but the egg eating has me disturbed and disgusted.