I have 2 female ducks who have hatched ducklings, the first *I think* hatched her babies at the end of June/beginning of July. This is a rough guess based on how old they looked when we looked at the house. We moved in mid August and the “babies” were fully feathered almost the size of a fully grown duck. The other female hatched her duckling about 4 weeks ago today. The one with the older ducklings is a Cayuga and the one,with a 4 week old, is a Rouen (so i was told). Also based on the loud honking/quacking I think my 3 older “babies” are female. At what age would they start laying?