Update for me - I've been feeding my meat birds fermented chick grower for about a week now. They overrun me when they see me coming with my orange Home Depot bucket! They LOVE the stuff!
Things I've noticed with my chickens:
1 - 10 meat birds have gone from emptying a 3 gallon waterer every 2 days to emptying a 1-gallon waterer about every 3!
2 - Instead of just laying around barely moving, they are all actually up and moving about like my layers, scratching and behaving like chickens.
3 - the litter smell is GONE!
4 - their feather have turned yellow! No fear - this isn't some weird side effect.
I was feeding them the dry grower crumble from old large bowls, which they seem to have a habitat wanting get right in to while they eat. Of course now with the runny liquidy FF, that has turned their whole breast area yellow. SIGH. I have to come up with a better feeding system.
Observations on the fermenting process
1 - I use two identical 5-gal buckets, with 3/32-inch holes drilled in the inside one. I have a rope system to hang it to drain, but it never really does completely drain and so the FF is really watery when I feed it out. I think the holes are too small and I may need to drill them out larger.
2 - the inner bucket does not seat all the way down into the outer bucket, of course because of the ridges around the top of the inner bucket. That leaves about 4 inches of "space" containing most of the water and UP/ACV in the bottom of the outer bucket and not really able to get up into the feed. I think this might be slowing down the fermentation process. I'm going to try a small inner bucket that seats all the way down into the outer bucket so all of the water and UP/ACV is exposed to the feed.
3 - some days my FF bubbles in the bucket, some days it doesn't. I was really excited the first time I saw it bubbling, but then the next couple days it never really did. I don't know if my UP/ACV is losing its poteny and I need a couple splashes more? Does this happen, or should I expect to pretty much go on infinitely with the brew I started without needing to add anything more than water to cover new feed added to the bucket? I've gone through pretty much a whole bottle of Bragg's, and at $7 a bottle, I don't want to have to buy more too often.
4 - I bought 2 bottles of regular ACV from the Dollar Store and added a few splashes of the Bragg's to try and "make" my own UP/ACV. It's been in the basement (dark, mostly) for about a week now. How do I know when it's "done"?