What’s Going On?

[chickenthyme]

I have a small flock of 5 hens that are just over 2 years. My Olive Egger originally was a great egg layer but after she molted last fall and took a break from laying, she finally started laying again but it’s been infrequent and for the most part, they are just the fairy egg size. Other two that are exactly the same age are for the most part continuing to lay regular size eggs. What could be up??

 

[aart]

they are just the fairy egg size.

Fairy egg sized or actual fairy eggs with no or an immature yolk.
Pics of egg contents would help here.
Is bird eating/drinking/pooping/moving around 'normally'?