I just called my feed store and YES they do have flock raiser!!! After reading many posts about feeding flock raiser, I think this is the way to go for my flock. BUT... the Purina website says feed flock raiser until 18-20 weeks then switch to Layena. Right now I have 7 hens laying, 4 more should start in the next couple of weeks, 1 hen a week or two after that, 1 roo, and I am about to add 10 ten and half week olds to the flock. I always offer oyster shell to my big girls, some scratch and treats of course, but other than that just laying pellets. Should I still switch to flock raiser even though it says to feed up to 18-20 weeks?