I'm surprised your red sex links arnt laying yet. I have 5 of them. The 1st one laid before 16 weeks. Another at 17 weeks and they had all layed at their first egg before the 19th week. They will be 21 weeks on Tuesday and I have a total of 78 eggs so far. They are averaging more than 3 eggs a day since the 1st week of August. I've had one day with 5 and 6 days with 4 eggs. My question is how many hours of light are your chickens getting? I think this is a big issue with a lot of chickens not laying. I propped my light up to 16 hours a day. I have a bulb come on at 4am. I figure I myswel get eggs before winter hits. Have they started squatting yet? Are they getting calcium? Do they free range at all?