Those are nice links.
I've been growing my own sprouts and culturing my own yogurt since the 70s, plus my grandmother that came over from Germany made her own sauerkraut, pickles and wine. I've also made my own wine and beer. I do have a basic understanding of fermented foods, cultured foods, sprouting, probiotics and prebiotics. I also have family and neighbors that own dairy farms, so I know what silage is. I don't mean that I know more than everyone else, I'm just saying that I have a basic familiarity with these topics.
What I don't have a familiarity of is what seems to be the newer (to me) practice of fermenting processed chicken feed. What I was trying to say is that I am wondering about the fermenting of processed chicken feed. It's not like a whole food, with vitamins contained within the tissues. It's basically finely ground and powdered foods that are mixed with added vitamins and minerals, to make a somewhat complete diet, then formed. If you add water to it, it disintegrates back into the preformed stage. Minerals will be at the bottom, with the feed. I'm wondering about the vitamins that may have been released from the food at that point, particularly the vitamin A in the food. Is that just free floating in the water or on top of the water? Does it get consumed or just stay in the liquid portion? Vitamins are lost from even fresh vegetables in a short time, so I am wondering what the loss would be in fermented processed feed. Plus, if soak water is poured off, I have concerns that those vitamins are lost.
For people that free range or feed other vegetable matter, the chickens have other sources of vitamins and it's not a big deal either way. I'm just wondering about chickens that don't get any other food at all. When I first joined this site, a lot of people didn't even believe that chickens could digest the wheat grass I was feeding them. I naturally wonder about the affect on chickens that only eat a processed feed long term, if the vitamin balance is off.
When I get time, I'll read the full meaties thread and look for this information.