Correct it makes protien and other nutrients more bio-available.I need a little refresher, from all the other FF people. I would ask on the FF thread, but it's not exactly friendly over there right now for opinions.
I read the FF series, but don't recall seeing the answer...fermenting the feed doesn't raise the protein, it just makes more of it available to the chicken. Yes? I was pretty sure this was something we all talked about way back, but I'm just rechecking.