It's a relief when they get all feathered in for sure.Maybe that's it? I'm also Im in texas in the middle of a 106 degree heat wave, I keep them in the shade and bring them frozen treats and frozen jugs of water throughout the day but maybe the heat is stalling their growth? It probably doesn't even works like that, I'm just surprised they still have patches of missing feathers and still have fuzzy necks as old as they are. Maybe my breeder was confused on their age? They are sweet though. little chicks just keep me worried , so fragile, I relax so much when they get bigger and feathered...