Re: kitten scooting his butt across floor--Help!!
My sister's kitten, Keanu, would always butt-scoot after going poop. He had worms, and the runs and always had stuff stuck to his butt. I would supervise him and wipe his butt after he went, be he'd scoot anyways, even when it was all clean.
Maybe he had an itch? I don't know. He stopped doing it when his poop improved with his new diet.