Here is a Question from Esther Beilman : What is this Awful Odor from my Boston’s Nostrils?
“My Boston has an awful odor from his nostrils (almost like sewer). It is not his breath, as I actually smelled it.. and it smells normal, non-offensive.
I’ve only noticed this for the past few weeks. He is contained in our yard, so there is nowhere that he could be getting into anything with this odor. Any ideas?”