I have a white leghorn pullet that was hatched the last week of March. So, she's now around 15 weeks old. Her comb is still very small and very pale. I saw a leghorn yesterday that was a month older, and she was SIGNIFICANTLY bigger, but more importantly, her comb was at least 3x the size of mine's, and hers was bright red. She'd been laying about two weeks. Mine seems light years younger though. Do I have an immature for her age pullet, or is there that dramatic of a change between 15-19 weeks?