For the past few days my DD (8mos) has had bad breath. Not horrible, but a noticeable morning breath/saliva smell all day. I've never noticed this before. She BFs on demand and gets 3 meals of solids a day...no changes to this or to the types of solids lately. Her top 2 teeth are coming in (just broke through the gums in the last 2 weeks). She's not drooling. She doesn't use a paci or have any other lovey/toy in her mouth. Thoughts on what's causing it? Is this a problem or common?