4 SS hens not laying as much

[dumb_cluck]

I've noticed that my 4 hens are not laying their "quota" lately. One of them is making a coo noise and has a pale looking comb. The other 3 have bright red combs and cluck their heads off. Is this normal?

I am feeding Layena.

 

[ChickensAreSweet]

https://www.backyardchickens.com/forum/viewtopic.php?id=423023&p=1
Here is a helpful thread.