what should I feed my birds when I am collecting eggs to hatch. Right now I have them on 2/3 Layena and 1/3 cracked corn and I give lettuce 2X week plus small amt of vitamins. Should I adde more protein and how, with what? the Layena I get is totally vegetarian and I do not want to buy the feed that has animal parts in it and I cant afford the organic stuff. Thanks Kris