Its not uncommon for adult cougar scat to be around 1.5 inches in diameter and 9 inches long.. they have somewhat blunted-off ends AND those stringy ends, so its kind of hard since they don't really have a tell-tale poop. Wolf scat is generally a LITTLE smaller... around 1 inch in diameter and 4-6 inches in length, but can have similar hair content... and they generally taper at one end.
Do cougars have that high of bone fragment content in their scat, though? Seems like the animal that "wolfs" its meal without chewing is, well, the wolf, right?