This is a sore on the lip that refuses to heal. If it is not cured, more and more of the lip is eroded until the full depth of the lip at the point of the ulcer has been eaten away and the gum and teeth are exposed. This condition should be treated by your veterinarian. Depending upon the severity of the condition, medical treatment, cauterization, X-ray, or surgery may be needed.
Map of Mount Ulla Photo Gallery