Full disclosure: I’m a bad person. I used to think it was funny to watch a dog sit down and row its bum along the ground, until I realised what was up.
Best-case scenario, scooting is a sign of a tricky poo; the sort that gets lodged halfway and needs a little assistance. Worst-case scenario, it could be a sign of worms, itchy skin or anal gland problems. And while the former may just about qualify for a legitimate smirk, the latter is more likely to mean a trip to the vet.