I understand it is risky letting them free range. Mine have access to over a half acre fenced and we do have coyotes plus all the other predators. At least the fence with barb wire around the top gives some protection but It's def not 100% foolproof. We do what we have to to protect our birds.
I love this fermentation method I think you will too.
When I first started fermenting their feed it was not a good procedure I was following but since I found this one I have never tried another.
Let me know what you think of it and how your birds like it.
I also use ACV with moither as a tonic 1X a week in their drinking buckets. 1 Tab per gallon. I use it too.