I have 7 female ducks. 5 are Rouens, 1 is a Rouen/pekin mix, and one is a mallard. In chickens, you can feel the distance between the pelvic bones as an indicator of laying, but is it the same for ducks? For all of my Rouens, I can fit around 3 fingers between the bones and at least five of them are laying. However, the mallard's pelvic bones are very close together and I can only fit one finger between them. Is she just different or not ready to lay yet. She is around 3 days older than the rouens, but still isn't laying. Does anybody have any idea when she could start laying?