I have a scootasaurus. 2 in fact. One female, she's fat and can't lick her butt so I have to warm wipe it clean regularly.
The other male, long hair. Poo was getting stuck to his back fur. I shaved around his booty, under his back legs and his tail. Now he stays clean.
I had another cat with anal gland problems. She mostly licked herself a lot. Never dragged.