To bad that these guys will be having this special diet when it is already a difficult time to get them to eat and there bones are being developed. You do not want any leg problems. Your feed store should sell a soybean meal. If they don't, have them order it. It should be about 47% protein but I have seen it as high as 54%. Corn should be about 8.5 % protein. Equal parts by weight should give you about a 27% protein depending on how high that soybean meal is. I would also add nutritional brewers yeast to give them extra nutrition. All health food stores carry it if your feed store does not. You can blend the corn in a vita-mix to get it to a texture that resembles turkey starter. What ever you decide if you need help formulating the mixture to the right amount of protein, drop me a PM.