Sergeant Schlock's kind are usually classified as "carbosilicate amorphs," and by molecular weight they are essentially peaty, clay-infused hairballs. The 'hair' is actually carbon nanotubes filled with the complex molecular machinery of memory and self-replication, but what you see from three feet away is startlingly similar to the droppings of a very large, very healthy ungulate.

Before you go lording it up over an amorph based on the fact that he or she is essentially 'peaty, hairy, clay," you should bear in mind that by the same rules you are a "bag of no-longer-potable water."