The biggest thing is not to worry about "is it fermenting right?". It's really pretty difficult to mess up. True, best to use well, spring or otherwise chlorine free water. But often folks have used chlorinated water and it turned out just fine, but they might have gotten lucky or already had a batch going. Just mix your feed and water until like thick oatmeal. Stir once or twice a day for 2-3 days, then it's ready to use. It doesn't matter if it has bubbles or not. It may or may not smell sour, or even like vomit, these are good signs. If it smells septic/anaerobic, that is not good, but I've never heard of it happening, as it usually takes much longer and not being stirred for that to happen, plus the feed is not easily prone for going septic, you'd almost need to inoculate it with some "bad bacteria".
If you've ever made sourdough bread, it's exactly the same process, except you are using chicken feed instead of flour.
The tik-tok link is a pretty good one about fermented feed.