7 month old ducks and no eggs

[Yukonn15]

I am not new to ducks or chickens but this is baffling me. May of 2020 I got 3 new female ducklings. They are 7 months old and no one has layed an egg yet. It is winter here in Michigan so is that it? I have 2 Peking and 1 Ancona. These are the only breeds I have ever kept and none layed in the winter. I just thought because they are just getting old enough they would lay no matter what season It was.They have plenty of room and a good size house that all the past ducks thought was more than adequate. Would like to hear some thoughts or any ideas.

 

[nuthatched]

Yrs, when the days are shorter, they often won't lay. They'll probably start in a few weeks