I know, this has been addressed a million times. But when I go looking for it I can't find anything directly addressing my current situation. I have 5 hens almost 2 yrs old (plus their roo). I also have 21 younger birds - mixed male & female, chickens & guineas - who are 21 weeks old. They free-range and I've been feeding grower-finisher feed for awhile now (used the gamebird starter first then regular chick starter, then the grower-finisher, according to directions on the feed package). I was feeding the older hens separately until we had to merge the coops due to predator problems, so there's been oyster shell and/or ground eggshells available to everyone for about 6 weeks now. Currently only one of the older hens is laying - they were slowing down for the winter, and several were molting, then they suddenly stopped when the predator problems happened. (Last year they laid right through the winter with only a little reduction in frequency.) One started up about a month ago, then a predator got her, and now the one has finally laid one egg every other day for a week. Several of the young pullets have just gotten red combs and I think one may be starting to squat, but none are investigating the nest boxes yet. The males have been practicing mating for weeks now - I expect the eggs to be fertile from the start (And I guess the guineas aren't expected to start until March or April anyway.) So my question is this: I have enough of the current bag of feed to last maybe a week. I'm thinking of going ahead and switching to layer - I think they're well beyond the age where the extra calcium is bad for them. Am I right? Does anyone think that would be a terrible idea? (I know chickens have survived on scratch and table scraps, but I would like mine to be as healthy as possible without going totally crazy!) Thanks to everyone for listening!!