Chris if you look back at post #7 the last sentence "chickens are omnivores so feed manufacturers must add chemical replacements for the amino acids that soy beans don't have"
Upon reading that was why my post #8.
I never made a claim to which was better.
Wouldn't having a lot of filler lower the protein content?
So by adding "filler" wouldn't you have to have a high source of protein to compensate for the "filler"?
Which would make the end product cost higher?
Plant Protein Products: soybean meal, canola meal, cottonseed meal, pea...