Ratchnick
Crowing
Hence the premix. But i think your over exagerating the effects of dilution. You dont have to add a bunch of soy meal to bump the protein significantly. I think the nutritional requirements are close enough it will be ok remember its just a starter. People over estimate the importance of pelleted feed. All maner of foul were raised just fine on whatever extra grain the farmer had for hundreds of years. Buying feed at all basicly started circa 1945.Protein is not the only thing it lacks, and adding things to it will change the percentage of other things not just protein.