The Sunfresh recipe from Purina is great. Its all vegetable, no animal proteins at all.
Our feedstore orders it for me (no extra cost) and last week my bags didn't come in so we bought them regualar layer pellets. They laid 2 eggs in 3 days. Gave the Purina as soon as it arrived, got 13 eggs in 3 days. They love their food and lay really well on it.
Your regular chick starter/grower will work just fine from the feed store. If you got your chicks vaccinated for cocci, make sure you don't get a feed with amprolium in it as it will nullify the vaccine. You can choose to go vegetarian or not, either way works. I personally use a feed that contains animal protein as chickens are omnivores. But if they free range, they can get that from bugs outside.