I wanted to run this by y'all to see what you think. I have 4 RSLs that are 21 weeks old. Only one is laying . The other 3 don't seem quite ready. Not much of a comb and no squatting. I'm not too worried about them they seem fine. The other is Gladys , she has a big red comb and is squatting,she started laying pretty ,small clean eggs,about one every other day for about 12 days. After that she has stopped,it's been 6 days now since she laid an egg. They are on nutrena all flock because I have 2 BR pullets that are 15 weeks. I have oyster shell free choice.I can't see any evidence that she's tried the oyster shell.I was going to finish this bag then go to layer feed. Should I be worried about her with this long delay? I just examined her and she seems fine. I felt her bottom and can't feel anything unusual. All my pullets are shiny clean and happy.