Thanks everyone! Now that I know I can give them starter/grower type feed long term, that opens the option of using organic feed. I have searched high and low for an organic feed that isn't loaded with calcium and I've only found one and it is a starter/grower. It may be cost prohibitive over the long haul but hopefully the egg money will support the costs.
The other reason I was asking is because I read a blog post on author Lisa Steele's site stating that Flock Raiser is only for meat birds due to the high protein content (20% I believe). It talked about how it will make your pet/laying chickens fat. I've also read posts against using All Flock if you only have chickens. So much different information and opinions out there! Makes it tough to figure out what to do but I trust the experience and knowledge of the BYC community!
Hi.
I use Purina Flock Raiser all year long for my mixed age/gender flock, OS free choice on the side. I think you are on the right track!
Let me clarify about flock raiser being for meat birds... Many layers ARE meat birds. If they are dual purpose birds like Barred Rock or Marans. They require a bit more protein than the lighter bodied breeds like Leghorn. And really when we talk about protein we are actually talking about the amino acids they contain. Here is a link showing feed requirements. (there is 1 misprint that says 5% and should be 15%) Note at the bottom it does state that birds not in lay should not be fed layer. Too much calcium OR protein *can* cause (2 types of) gout and/or kidney failure (doesn't mean will)... But the protein would need to be in the 30% plus range. Many show breeders actually feed gamebird feed that is 25-28% protein because it gives them nicer, shinier feathers... feathers are made from 90% protein.
http://ucanr.edu/sites/poultry/files/186894.pdf
All good answers already.

It's true I haven't found organic flock raiser, so I think you would have to go with a starter like you said. I don't see it as a problem and have considered it, but not affordable for me. IF you think it's too much protein long term, then you could cut it with some organic grains like oats or barley, (maybe corn). If you do go organic then you should be charging more for your eggs. Seems to me like chickens should eat less feed if it's higher protein since they eat to meet their energy (meaning calorie not nutrient) need and I would think protein has more calories than the OS that is *usually* in there instead.
All flock/flock raiser/starter/grower... different names, the only thing that matters is nutrients so read the tag because they may not have what you expect. Mostly boils down to protein and calcium for me, but I ALSO like to read the ingredients and pick the best sounding. Vagueness is not my friend!
I'm not harping on you... but I also do ferment. The difference that made me stick with it was the reduction in how bad the poo stinks, especially in the brooder!

In addition to that I do save about 10% on my feed bill (not the 30% claimed by some). Since I have 60 ish birds that is significant. However, I keep it as simple as feed, water, stir, wait 3-4 days (depends on temps) and feed out (no acv needed). It *might* take the birds a couple of introductions since they are creatures of habit. But once they make the connection they will be all over it. I have talked with several nutritionist and dietitians and ALL agree there are benefits to fermenting. So if you have enough birds or the time to consider it, maybe check out the link in my signature line. It does take a few minutes each day verses some people leave their dry feed in auto feeder bins. I don't do that because I can't afford to feed all the wildlife... so I already feed enough to last all day in the morning and I put it up at night. I only feed FF and free range on pasture. i found if I fed several times per day, they were excited to see me and thinking it's treat like so they would pig out every time, which didn't help my feed bill. But now they just hit the feeder up when they want. But still if I grab a handful and start dropping it, they go crazy like treats.

But since that's all they get, if I want I can take out feed pellets and drop them... letting them think they are getting a treat and give them a LITTLE something to scratch for, and it isn't going to throw off their nutritional balance and cause any health or behavioral issues as is the case for people who feed out TOO MUCH un-nutritious "scratch" which *usually* has about 8% protein.
Regarding chickens getting fat... that may be a personal opinion of hers and I wish people would speak from experience. NONE of my birds are overweight for their breed standard and all have been eating the 20% protein since hatch, 1.5 years now. Yes, it MAY have some effect as I have read reports that... in broiler breeds, specifically Cornish Cross... feeding a lower protein diet starting early on DID indeed improve their fertility and longevity... But those birds are an atrocity IMO, and bred specifically to gain weight. None of the heritage breed cockerels we processed had extra weight or subcutaneous fat. Alternatively, Metzer Farms where I just got my ducklings and a trusted source for me, also state on their site that they improve their fertility BY controlling their ducks' weight during the growing period.
Don't forget to shop around... I pay $3.45 less per bag at 1 store than the other for the SAME feed!
Hope this helps.
