I have a flock of 19 chickens of mixed ages. The oldest are a couple of years old and there are 11 "babies" that are now 27 weeks. I fed them starter feed for about 10 weeks and then put them outside with the older birds. I combined chick/layer feed for a few weeks and then ran out of chick feed so just let everyone have layer feed. Now the "babies" are 27 weeks and not laying. Have I permanently messed them up so they will never lay? They look great - healthy, developing red combs, etc. No changes to the coop, fresh air, very large run. Thank you! (The younger ones are all Rhode Island reds.)