Fermented feed. I believe it is frozen apple juice..not just water, you want unpasturized apple cidervinegar to start. One small bottle lasts forever, because you just keep adding water and feed to it and it continues to ferment. It does need the sugar to burn, else it won't work. Regular apple juice is pasturized, the heat kills the culture. You can also start it with yeast...but it takes a month to turn to vinegar. Some grocery stores carry it now. It does breakdown and release probiotics, It also maintains the croup and acidic nature of the digestive tract. Keeps em healthy. Ever check a wild turkey croup, has that slightly fermented smell. Very little alcohol is produced...but, if you warmed it enough and kept adding spring water and caught the steam off in coils, the alcohol would condense inside the coils and drip out the other side. Mine condenses inside the lid which is why the chicken lick that first.
Use glass plastic or wood,no metal. I never did dig my bucket out of the snow drift....when I finally fed it the chickens tried to jump into the bucket. Right now am fermenting whole corn (give it two extra days, barley, and oats. The kernals plump up and actually taste fresh. Haha. Yes, I've sample. Cuts cost, said to reduce poop smell as well. Just like that I'm not feeding dry dusty grains.