My Cornish X girls are 8.5 months old and lay beautiful eggs.
They started laying at about 4.5 months old. They each get 1 and 1/8 cup 18% layer/breeder crumbles divided into meals throughout the day, plus grass and bugs from ranging, and multi-vitamin supplement in their water. I found too much fruit and veggies gave them runny poop. Check out my update on them.
https://www.backyardchickens.com/forum/viewtopic.php?id=215554


https://www.backyardchickens.com/forum/viewtopic.php?id=215554