I have. I used EM-1 solution that I made from rice water and milk. There are multiple bacteria in em-1 that will ferment. They are voracious and will eat just about anything. I used coffee, fruits and vegetables, batshit, and really just whatever popped in my head. This was years ago, maybe thirteen or fourteen years so I don't remember a lot of details. What I do remember is that it made batshit instantly available, like a chemical fertilizer. It was an experimental phase and I had some other issues to iron out (which I since have) but I drifted away from it, always intending to get back but as of yet, haven't. I would say if you can get a good fermented product to absolutely give it a shot.
