frequent mud-like stools with a foul odor

If it were me I'd take one or more of these: Wormwood extract in water, wild oil of oregano (I use gel caps) and grape seed extract pills. But's that's me. I started each one of these separately in small doses to see if my gut was OK with each and every and they really seem to keep the bad bacteria down. Beautiful poo in other words.

I take a probiotic every morning and the above antibacterials in the evening before bed.
You should also consider eating more greens such as fresh cooked spinach and any cooked green such as mustard greens, kale or collards. Good soluble fiber and good minerals/vitamins.

When things are going well I back off the wormwood and WOO for weeks at a time.

Good luck.

Have you tried metamucil or something to bulk things up? Funny I say this because I was complain about the same things you described and people always say fiber and I still don't take it. We really should give it a try.