Dog smells like death and bathing doesn't help

Hi @knitsybitsy! Does this happen every time? I had this problem once but the next time i washed my dog it was faster. Have you tried resetting the dog and the sim (dog needs a last name to do it in command box), or do it by activating cheats and shift click them both. 

Or do you have any mods in game that might do something weird, try removing them if so 🙂