I only feed in the evenings right before the chickens go to roost and it's just their normal laying ration. I free range, so I like them to start the day without too much food to encourage good foraging. Feeding in the evening also insures they don't go to bed with an empty stomach.
It does cause more poop on the roosts but I rather like more manure in my bedding as it is intended for my garden in the spring.
As for eggshell production at night, I hadn't ever heard that but I do know this: The egg for the next day is already hardened and waiting in the shute by nightfall the previous evening. This I know because I do digital examination to determine who is laying and can palpate the hard-shelled egg through the intestinal wall.
It does cause more poop on the roosts but I rather like more manure in my bedding as it is intended for my garden in the spring.
As for eggshell production at night, I hadn't ever heard that but I do know this: The egg for the next day is already hardened and waiting in the shute by nightfall the previous evening. This I know because I do digital examination to determine who is laying and can palpate the hard-shelled egg through the intestinal wall.