Easiest way is add feed to water and stir, wait a couple of day, stir it once a day. Should start to smell a little sour if you are doing this in temps of 50* or above. If using tap water it may take a little longer. If too soupy after all the feed has absorbed all it can, you can add more feed to make it thicker. Use less water next time. After you smell that sour smell, you can start feeding it out. I feed once a day, only what they can clean up that day.
Here's a site that will answer most any questions that arise after that.
https://www.backyardchickens.com/image/id/18179810/width/700/height/700/flags/LL
When doing your research, be sure and bypass any blog sites and forums and go straight to government studies and factual material that is knowledgeable about fermentation of grains, as there are a few sites that have led many astray and they don't contain the information you will be looking for to gain a working knowledge of the method. There are also two major threads already on BYC that list some sources and links for studies done.
Here's a site that will answer most any questions that arise after that.
https://www.backyardchickens.com/image/id/18179810/width/700/height/700/flags/LL
When doing your research, be sure and bypass any blog sites and forums and go straight to government studies and factual material that is knowledgeable about fermentation of grains, as there are a few sites that have led many astray and they don't contain the information you will be looking for to gain a working knowledge of the method. There are also two major threads already on BYC that list some sources and links for studies done.