We have 7 week old chicks and a mumma hen. They're all on a 'grower' feed at the moment, which can't be used for layers. Mum has laid her first eggs this week, which means we're unable to eat them. My question is, will the chicks grow as well, and be as capable as layers later, if we switch them all to a layer mix at 7 weeks? Thanking you in advance!