Simple recipe I've used for 2 years, choose your grains (I use a combo of cracked corn, wheat, oats, boss) (not all those every time ness. boss usually mostly in winter) cover w/ water, go back a few times and add more water until it is fully covered by about 1 or so inches and has quit absorbing, cover w/ a non sealing lid (I use big 30 gall plastic trash can) wait several days it will begin to bubble and ferment. The longer it ferments the better it won't spoil. When you feed out just drain most of the water off, easy if you are doing grain more time involved if you are using feed. Add new to the old liquid, my ferment liquid has never been tossed in 2 years. If you are fermenting feed no need for time consuming draining just feed out wet and add more water as needed. Don't use a metal container it will corrode and leach bad things into the food.