I got my girls as day old on july 6 that makes them 19 weeks today they are a brown leghorn and a plymoth barred.
Not to sound insulting but you will get eggs when they are mature enough to lay. Different breeds mature at different ages and hatchery stock usually matures at a younger age than breeder stock. The things to look for are wattles and combs getting bigger and redder, see if they start squatting for you and if they start singing the egg song. I have two of my seven pullets finally laying and they are over 30 weeks old. None of mine have squatted for me and I have heard the egg song only once so not all chickens do this. They will also start investigating the nests when they are getting ready. I would put out oyster shell if your pullets are still on grower food just in case they are getting ready to lay.
Within the next few weeks probably. Unless you have a slow maturing breed, most start laying in the 20-30 week range. Slow maturing breeds like silver penciled rocks, brahmas, etc take longer. Just keep in mind that the later they lay, the better it is for the overall health of the chicken. Early laying can cause problems later in their little lives.
