i have 21 chickens total and 1 rooster, iv been getting 12-16 eggs aday from them. i have a light on a timer on at 3am off at 9am . i got 18 eggs friday thats the most so far. in one day iv been useing the light on timer since end of september. what could get them to all lay in one day . they have fresh water and feed 24/7 i feed blueseal layer mash. i give them cracked corn for a treat . the breeds i have are all standard birds i have 14 pullets all 9 months old 6- cinnamon queens , 3- golden laced wyandottes , 2 buff orpingtons , 2 barred rocks, 1 delaware, my older birds are 1.5 to 2 yrs old. they are 2 delaware, 3 buff orpingtons, 2 red sexlinks, 1 white rock rooster 7 months old,