I have 9 peking ducks who are 7 months old. 6 males, 3 females. 3 of them stay apart from the others - 2 males and 1 female. I've found a few eggs randomly laid around the pond so I put 2 dog crates with hay for them to lay in. How do you know if they're ready to nest and set and at what age do they typically do this? I've only had them about 5 weeks and they live freely on my 1/2 acre pond.