Ducks not laying eggs

[Hball]

Hello!
I have 1 female that just turned 18 weeks old. I got 3 more females about a month ago and was told they were a year old and the two runners were supposed to be laying, but they haven’t. Could it be due to stress from the transition or cooler weather?

 

[_-Captain BRM-_]

Give them a little bit, they should start laying soon!

 

[Canadian Wind]

Also remember that most ducks are seasonal layers. They may not lay until Spring. Especially the 18 week old one. They usually start laying at around 7 months, depending on breed.