Two years ago, we caught dear Willis in a raccoon trap on accident, had him neutered, and he became my First Cat.
It became apparent early on that he had stinky cat breath (really, really stinky). I asked the vet about this (at ~one year old, his teeth were not in need of cleaning) and she handed me a packet of kitty dental treats. Willis doesn’t like them, but the dog does!
Willis eats The Honest Kitchen cat food. Occasionally he’ll steal some zucchini or bread off an abandoned plate, but this is pretty rare. He is also rarely given some ground meat or scrambled eggs in his dinner. I check his teeth regularly and there still isn’t significant tarter build up.
The internet tells me that cats should not have bad breath (particularly awful sewage breath) and that something must be wrong, but the vet is not interested and there doesn’t seem to be a problem. Willis is super active and otherwise functions as a cat. He does produce puddles of drool when cuddled, but I assumed that was just an unfortunate feature of cats.
So… cat breath- problem needing to be uncovered and solved or “sorry your cat has stinky breath”