Probably about to out myself here.
Wolfiecat is 19. Arthritis and a thyroid condition. Both easily treatable. Recently we've found underfur matting and cat really does NOT want to be groomed. (Think hiss, spit, wetting self.) Still fine. Found a different grooming tool.
Friday. Ok. By today she stinks. Last night she spent shut in the kitchen as her back end was so covered in pooh we couldn't let her in the house (DH spent an hour trying to clean her up.)
Is this the end? Calling the vet tomorrow.