I am wondering when my hatchery Rhode Island Reds and Barred Plymouth Rocks will start laying. Right now they are about 3 and a half months, wondering when I should start supplementing oyster shells and placing nest liners and golf balls/ ceramic eggs in the nesting boxes. Will they start laying around the same time, and will it be in a month, half a month, 2 months or more like 1 and a half months? I have read that 4 months is early, but not uncommon, and also 6 months is a little late for hatchery but also not uncommon. If it makes a difference, my rooster (the same age) has been crowing for a good 2, 3 weeks and is starting to grab onto their neck feathers and attempt to mount, but the ladies run in circles and shake him off. The wait is just killing me!