Not to sound like a broken record...

[southerndesert]

To OP,

Perhaps have a fecal test run by a vet.... Worms do not always show up in the poop so you can see them and worms will slow egg production as well.

 

[cjvdub]

As far as lighting is concerned, this is what I do. Currently the timer comes on at 6 am and is off at 8 pm. I am in Massachusetts and the current daylight is about 6am to 4pm.

By design, I had the hens under no lights from September - October. I was getting no eggs from 10 birds (7 hens, three pullets)

In November I began lengthening the days until getting to 14 hours daylight. 6 of the birds have started to lay this week. Yesterday I got the first eggs from 4 of the hens. I expect all will be laying in the next week or so. These aren't production birds, but various standard breeds, bantam and large fowl.

This lighting structure has worked well for me the past couple years. Crowing is a problem hear, so extending the day into the night works better than starting it early.

Corey