Any idea why a one-year-old baby with lovely sparkly white teeth would have yucky fish-market breath? Is worm-free, digestion is great if stools are any indicator. Eats Pro Plan Performance. ??

Have you thoroughly checked between his teeth to make sure there isn't a piece of stick or something decaying in there? Abscessed tooth? How about a foreign body in his nose (foxtail or other)?

Negative. She's had this going on for as long as I can remember, ever since she lost her initial pleasant "puppy" breath.

Try adding coconut oil to her diet. I use the capsules. It helps.

Infection below the gum line or acid reflux.

Short term fishy smelling breath can also be indicative of anal glands that need to be emptied.

Had this happen once and after a few days realized a stick was lodged across the roof of her mouth; check to be sure!