My dog, Evan, has the same issue. I logged on to post to see if anyone had any suggestions. He's a healthy 5 yr old who gets to chew on marrow bones regularly. He eats Evo, and occasionally a raw diet.
The bad breath is recent. His teeth look pretty clean. I was going to have them cleaned last year when he was in for TPLO surgery but they wouldn't do it at the same time. During his pre- and post-op care, he ended up being sedated for x-rays four more times, and not enough to do teeth cleaning so I don't want to knock him out if it's not absolutely necessary.
I was wondering if anyone had any other suggestions about what might cause this sudden bad breath? I suspect it could signify an underlying condition, but I suspect the vet won't have any particular tests he could do, given the lack of other symptoms.
Help.
Jocelyn