I'd say that's the culprit then.. especially if she does eat any dairy. At around 16-17 months I noticed my toddlers breath was stinky in the mornings if we missed brushing his teeth the night before, and that was around the time he started eating solids properly (late starter - he was still 80% BM until then). I wish someone would invent a yummy tasting spray on listerine for toddlers. Would make dental care so much easier in the first couple of years!