We have approx 100 hens, Rhode Island Reds, Production reds, and some white leghorn. We started with 30 and then added about 70 more to our flock back in March, ages between 8 months and 18 months, they were laying up to 50 eggs a day during spring but end of June they all quit laying, I mean zero eggs since then.
We feed them layer crumbles and scratch on a daily basis, also occasional veggies. We give them layer boost, and vitamins and electrolytes. They get plenty of fresh water every day. We have 4 10x10 coops where they sleep.....