I just came accross your post and just wondering how's it going with your research?
I don't keep any of the bigger livestock just chickens and was looking into cutting back on the manufactured feed and growing my own chicken feed as well...which I'm still working on. So when I saw Islanadgal99 coment that pig feed is about the same as chicken feed I thought maybe I could join in and share what I've been doing and just share some ideas.
I'm leaning towards micro-green and sprouts, also fermentation of sprouted wheat and maybe more. I live in a area which for about 6 months of the year it is either to cold or 6 months where summers are dry as a bone to do a permaculture type plan.
So far this is what I do.......
In a days feeding they get......
4 cups sprouted wheat berries mostly (sometimes a little barley/oats)..
4 cups fermented sprouted wheat berries.....
4 cups BOSS shoots......
6 cups of a cooked corn (which is done by a process called Nixtamalization) and cooked organic soya beans (ratio is about 3 to 1)
I will be adding different lentil sprouts/shoots soon....just gotta make a trip to the local organic granary.
I've been working out natural vitamin and minerals sources, my bump in the road so far is bioavailable forms of Vitamin B12 and D3 in a DIY method that I can implement. For B12 I'm thinking my only choice would be a lquid b12 and for D3 I'm thinking cod liver oil.
food for thought