My mini dachshund has THE most horrible breath!! I am not talking puppy breath, I am talking breath that smells like he eats a dead rat every single day! My question is and the reason it is in this part of the forum is: could it be the dog food? Should I change it and see if that helps? I cannot think of any other reason why his breath is so offensive. He's been to the vet, has no decay in teeth, gums are good, etc. Clearly my vet as at a loss or I wouldn't be asking all of you for your expert advice!