Persistent Bad Breath (but perfect teeth!)

Hello vets! Looking for some insight. Pet: Mr Pancake, greyhound, age 5, ex racing dog. Mr Pancake has really bad breath. He has had a full dental clean and scale and no bad teeth were found at all, no gum issues, his mouth looks perfect in every way; but within 48 hours of the dental, his stinky stinky breath was back. It's way worse than any dog I've had and I've had heaps, it's definitely not just normal dog breath! He has no known gut issues (no gastrointestinal symptoms). He is an ex racer, and I know they often have bad teeth, but as I said there's no evidence at all that his teeth are the issue. He eats a diet of raw minced, usually chicken or kangaroo, and a good quality kibble. Is this something I should be worried about? Ideally I'd like some sort of solution but my first hurdle is making sure this isn't a major worry. He has no known health concerns, yearly blood tests as he's a blood donor (hero boy!), up to date on worming and flea and tick prevention. Any insight at all is great!!

Hello!  You are right in that bad teeth are only one cause of bad breath, amongst many.  Others can include signs of chronic disease such as high ketones ( the breath smells of pear-drops), coprophagia ( dogs eating their own faeces), anal gland disease, some types of kidney or liver disease and physical digestive problems such lumps, swellings or pouches in the food canal.  Does your vet have a plan to investigate this further? - as it may prove worthwhile.

Hello!  You are right in that bad teeth are only one cause of bad breath, amongst many.  Others can include signs of chronic disease such as high ketones ( the breath smells of pear-drops), coprophagia ( dogs eating their own faeces), anal gland disease, some types of kidney or liver disease and physical digestive problems such lumps, swellings or pouches in the food canal.  Does your vet have a plan to investigate this further? - as it may prove worthwhile.

It my be worth mentioning that not all dogs with megaoesophagus ( enlarged food pipe) reflux their food.