I live in Washington state and I feed my hens and ducks Payback feeds. I start them out on Hatch to Hen, then switch to Organic Egg Layer Ration pellets when they are older. They also have areas to forage in, and get nearly all the food scraps/compost from my kitchen, which they love going through. Egg production is great, and I've never had a health problem with any of my hens or chicks, other than the occasional raccoon. Once in a while I give my hens an un-milled/straight grain type feed (like Scratch and Peck), but it is more as a treat since they tend to ignore the mineral mix that's added and just eat the grains only, which is kind of like feeding them high-carbo cookies or something. So, to make sure they get everything they need, their main feed ration is pellets since they can't pick and choose the high-carb grains, and instead get every nutrient in the pellet.
I use the organic pellets when they reach laying age because I don't want any gmo grains getting into the chickens that lay the eggs my children eat. There's a lot of unresolved controversy about gmos and long-term effect on health, and until we don't have the same companies that make the stuff approving its' sale via the FDA, I can't take chances with my kid's health. I tend to look at info from Europe and such where big Ag isn't also on the same boards that approve the stuff for sale, and the gmo grains are getting banned in more and more places because of health concerns.