I was thinking about this in the dreamy early morning ... pre coffee.
There are various reasons to ferment your chicken feed. A big one is to reduce waste ... crumbles and mash feeds are easy to spill and then are often ignored, but also less appetizing particles of ingredients are often the smaller particles and those can sift to the bottom of the feeder and then get ignored because they don't smell, taste or look right to the bird ... so moist feeds are more efficient than crumbles or mashes. Another good reason is to introduce some healthy colonies to the feed ... prebiotics, probiotics and B vitamins. Another is to digest away anti-nutrients in grains, seeds and legumes. Another is to change the amino acid profile of the feed so vegitable-based proteins are more "complete" for our birds. Another is to simply soften the feed to make the food easier for the animal to digest so it is more efficient (which is a big part of what chickens are doing when they scratch through poo ... besides bugs, they are looking for partially-digested feed as that is easier for them to digest and absorb).
With that last point in mind, and keeping in mind that chickens can only "process" a few ounces of feed at a time, and keeping in mind BK's reports of how fully digested her flock's feed is by the time it becomes poo so that her dog Jake is no longer chicken-poo obsessed ... I ask myself, "Why are we trending toward wanting to feed our birds whole grains?" Even fermented, are those whole grains likely to be fully utilized by the bird for maximum nutrition, thrift, and efficiency? Yes, our birds love whole grain scratch treats, but is a whole-grain FEED "nutritious enough" for our birds?