It should develop on its own, and is probably sped up by eating the droppings of other healthy torts. You can get 'probiotics' in the pet store or health store that are basically the same thing that should work (I doubt you need a special reptile version, but do not know that for sure.) Live-culture yogurt would work as well, but torts cannot digest dairy products.
I am bringing this back up, because the big guy is eating a lot of hay and pooping a lot of hay but still not digesting it very well. I looked into some probiotics and am going to give him some equine probiotics. If no body knows of a reason not to, I'll let you know how it goes.
What you are describing sounds normal. If the poo from mine sits out in the weather for a while, it starts to like like a little pile of dried grass again. Grass is very difficult to digest and most of it passes through undigested, but serves as necessary "roughage". Pretty similar to horses although horses chew theirs a bit more before swallowing. Post a pic of your torts poo and I'll post a pic of my torts poo and we can compare tortoise poo! What fun!!!
Sorry Carl. I just saw your post. I was flying home from Mexico the day you first posted the poo pics. It looks totally normal to me too. Looks just like my torts poo. Hey that rhymed, didn't it?