Dog Nose Running. Avoiding the allergy trigger is the best. Common cause for dogs running nose common causes of a runny nose in dogs while a slight mucus in the nose of a dog may not be alarming, if it festers, or you detect any other symptoms, you need to consult with a veterinarian as soon as possible.
There are times when a problem is a serious fungal infection, or just a small case of kennel cough. On the other hand, a persistent runny nose accompanied by blood or pus in discharge can signal your dog is suffering from serious health issues. The roots of the teeth are close to the nasal passage, and because of that, a runny nose will begin to occur.