Bacterial overgrowth in the mouth is often the reason for bad breath, especially for dogs who don’t get regular tooth brushing. Regular brushing also helps your dog get used to the toothbrush, making the experience less difficult for both of you in the long term.
Generally, bad breath on its own is not an emergency. Pay attention to it when bad breath lingers for more than a day or two, and you may want to schedule an appointment with your veterinarian.
If your dog is exhibiting other symptoms in addition to the bad breath or if the bad breath develops suddenly, these are signs of a more urgent issue:
Pro Tip: Bad breath requires urgent veterinary attention if your dog is showing other signs such as inappetance, weight loss, and increase in drinking/urinating.