The same thing happened to me about 3 weeks ago. Their egg laying was just fine, but then my silkie went broody and my egg production vanished!! I was so disappointed. I got one egg about every 4 days. Then I was outside and I heard one of my ladies singing her song. I ran across the yard to find her and she was about 5 feet in the air on top of a huge wood pile letting the whole world know about it
I got down and started looking around. A hidden nest is what I found. It was super hard to collect them all. They were deep in the wood pile, but there was 17-22 eggs 
I can't remember eggs-actly how many, but it was between that somewhere. I was so mad, but I thought it was hilarious at the same time So now when I can't find the eggs, I know where to look. They kept escaping from their run. I finally have all the holes blocked! A good 4-5 days they have stayed in the run!! Yay!! But they have stopped laying now -_-
Well, the good news is, my humidity isn't 25, it's actually 33! I need to up it a bit, but I know how.
I have 10 in there. 9 RIR/EE and 1 Leghorn/EE.
