I have 5 female ducks, I have 4 laying daily now but 1 who isn't doing anything. It takes them time. I'm not worried. My first eggs started appearing around 21ish weeks and it was one a day and now at about 26 weeks I'm getting the 4 I mentioned. I'm inundated. I planned on 5 ducks producing about 15 eggs a week but at this rate even with 4 I'm looking at 28 a week, some double yokers.
@Tigeresslane Sometimes it just takes some ducks longer. A 7mo duck would of been a hatchling in feb so you should get some soon if you give them proper nutrition. Given the Cayuga and it's being know for different color eggs, I am suspicious that that's my non-layer. But I went from 1 egg 3 weeks ago to 4 a day for the past 3 days so just don't worry. As long as they get food, it will come.