Richmond, Missouri is currently only receiving just over 10 1/2 hours of daylight this time of year. Chickens require 14 hours of light daily for optimal egg production. The 3+ hour deficit is likely the culprit and NOT your flock. Your area is scheduled to start receiving a full 14+ hours of natural daylight on May 4th, 2020. By this time, you will have noticed a significant increase in production the month prior. Link to source posted here so that you can bookmark it for future use, https://sunrise-sunset.org/us/richmond-mo/2020/5 (Switching months shown links are on both left and right side of webpage, about 2/3 of the way down the page.)
We used to have a chest-type freezer big enough for a couple of deer or a side of beef, easy, but it was like 20 years old and really ran up the electric bill so we got a smaller one. You could have hidden a body in it. Still deciding what kind of cockerels to order, what are you getting?
anywho currently it comes on at 4am and off around 630-645 when it’s dusk they go in and roost and it shuts off. I will be changing these times as the days continue to shorten...I’ll adjust so they get at least 14hrs of light and it still shuts off just after they go in to roost (dusk). Hope this helps. Maybe this is worth a shot before u cull the entire flock. Also perhaps caging a couple younger ones and seeing if u get eggs might also be a good way. I never knew if my sons pullet was laying until he took her to the fair. Can’t mistake an egg in a cage for anyone else’s

