My 5 month old Cayuga duck has gone missing. There are no signs of a predator. There are no feathers,blood, or tracks. My dad, grandpa, brother, uncle and I have looked around for hours with no trace of my Cayuga. We've narrowed it down to her flying away or she's sitting on eggs in a bush. I'm not sure if she can fly. She is also very cautious and she would never stray away from my Pekins. What do you guys think?