I started making my own feed but I don't think I have enough protein. Can someone tell me what my protein percentage is in my feed. I am mixing 40% wheat 30% corn 15% oats and 15% sunflower. I am getting 1200# of feed at a time. I would like to be around 16 or 17% protein. If my protein percent isn't high enough what can I add and how much to improve my feed quality?