Whose mouth is cleaner human cat dog or ferret?

Ferrets have the cleanest mouths out of the four options. Their mouths contain fewer bacteria than humans, cats, and dogs. This is because ferrets are carnivores and their diet consists mainly of meat. Meat is a natural antibacterial agent, so it helps to keep ferrets' mouths clean. Additionally, ferrets have a short digestive tract, which means that food passes through their bodies quickly and there is less time for bacteria to grow.