Tyrannasaurus Chix--Well, I think they were born around the first of April, maybe even the last week of March ( the breeder wasn't quite sure--he was kind of overrun with chickens--can you imagine??? lol), so they could be as old as 18 or 19 weeks old. We got them about the begining of May. They sure seem almost full sized to me, especially the roosers in the bunch! We fed them starter feed, then grower, plus they free range for several hours per day. That's probably why they are such Fatties! MY EE's are much smaller, too, even taking into account the EE's are about one month younger..... I would love to see Pix of your chix!