I went to get my second 50 lb bag of feed yesterday for my 26, almost 3 week old Cornish X chicks. The first bag I got was 21% protein, starter/grower which my feed mill grinds/ mixes themselves($9.20 per bag). I wanted a feed that was 23%-24%, I asked if they had anything higher. They told me they didn't. I know one guy that works there pretty well. He said I could add 7 lbs of soy meal to a bag, and that would get me near the percent I was looking for. They gave me the 7lbs of soy meal in a paper bag. When I got home, I dumped half the feed into my metal trash can and then put half the soy meal and mixed it well. Added the other half of both and mixed it well. Ta-Da! 23% feed. The best part was they only charged me $.77 more! For others out there looking for the smae thing, your local feed store may do the same for you. They should know how much to add to get to any % desired.