Some where in the house i have an old dairy book with grain conversion tables.
Back when i raised hogs milo was a 1-1 sub to corn.
Grass fed does have a yellow tint if not fed some grain a few weeks before being butchered.
I had some hogs on an old alfalfa field and the first butchered had a green tint and you could taste a slight taste of broccoli.
Peanut trash would turn the fat tan to light brown.
