Dog's breath smells like tuna despite clean teeth. Is it normal?

Question

My dogs teeth are very clean and I brush his teeth everyday. However, his breath smells awful kinda like tuna. Is this normal? I know dogs mouths don't smell like flowers ;) but his breath is pretty bad. Hes very active,happy and seems healthy. How can I make his mouth smell better? (I included a photo). Pet's info: Dog | Dachshund | Male | neutered | 6 years and 9 months old | 16 lbs

Sara Farmer, DVM · Accepted Answer

Sometimes dogs will have bad breath that is due to their diet, or occasionally it can be a sign of gastrointestinal disease. Even though his teeth do have minimal tartar in your photo he still could have dental disease - most dental disease is below the gum line in dogs. You may want to have your vet examine Oscar’s mouth closely for any signs of a problem if the tub breath is new.

Dog's breath smells like tuna despite clean teeth. Is it normal?

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