Talking about fermenting grains reminds me of when many years ago, I bought a new young boar hog to cover the gilts I'd bred from my main boar, and the one I found that had the best body type and traits I felt I most needed to offset some faults in those young gilts happened to belong to a guy living off in the deep backwoods, real folksy old guy, it was obvious his hogs were a 'complimentary crop' for his "other business' which was moonshine! The hogs got the spent 'sour mash'! i noticed all his hogs looked unusually 'red eyed', and they boar I bought was white, so it was really obvious on him. But it didn't really dawn on me the poor thing was an absolute drunken sot!
At the time, I was feeding grains, mostly corn chops called 'sweepings' I got cheap from a mill, yeah, the spilled stuff that got swept up at the end of the day, along with a protein, vitamin/mineral powder , I'd mix it and put water on it to soak a few hours before feeding. But that poor boar would root through that stuff, eat a little, but throw most of it out of the trough looking for 'something else', lol! His mood started getting kinda bad, too, he had seemed reallaid back and easy to handle when I got him,but he started getting obnoxiously cross and pushy. I realized he was going through alcohol withdrawal! So i started letting it soak a few days. depending on how hot the weather was, until it was really good and fermented...taking a deep breath when you opened this barrels I had it in could make your head spin, lol! That made him happy, and he was once again his laid backmellow self! But my other hogs liked it so much too, i started feeing it to all of them, had a system going with 3 or 4 50 gallon drums at a time, rotating so that by the time on was empty and ready to fill with fresh corn, the one on the other end of the row was ready to feed out of. I had one happy and mellow bunch of drunken hogs!
But the real surprises came in feed efficiency and quality of meat at slaughter. Feed efficiency to weight gains went up at least 20%, and that fermented corn produced the prettiest fine, pale pink tender pork I had ever gotten on my slaughter hogs. I tried it on my chickens, but it didn't produce such good results for my laying flock,they plumped up but egg production actually dropped off a bit...but, it did turn out to be fantastic for raising the 'meaties' once they were off starter. I always offered the milled grower food for what minerals and nutrients the fermented corn lacked, with two feedings of the fermented corn, morning and evening, all they'd clean up pretty quick. And they were the plumpest, juiciest, tenderest of any i raised.