Last year my stools looked awful, undigested stuff, and reaaally weird looking altogether. Sometimes it almost looked like sea algae.
Later, a nutritionist had me on very powerful probiotics and a diet consisting of broken down foods (mashed potatoes, mashed vegetables, etc...). A very simple diet. And my stool's looked better since that. There's the occasional runny one, so digestion isn't brilliant, but better.
Still not feeling any better at all, though. In fact, still getting worse daily.