Why Does My Dog S Breath Stink All Of A Sudden. Dog owners tend to dismiss bad dog breath as just dog breath, but there is usually a very good reason behind the odor. This produces an unpleasant odor.
Did you know that the incidence of dental diseases increases as dogs get older? Why does my dog’s mouth smell like metal? The urea can make a dog’s breath smell like ammonia or urine, which may be an indicator of serious kidney dysfunction.