What Is the Cause of Dark Bloody Mucous in a Dogs Stool?
In most cases, dark, bloody mucous (melena) occurs in a dog’s stool when internal bleeding begins in the animal’s stomach or small intestines, and that blood is partially digested before it passes through the dog’s colon. It can be caused by a number of factors.UlcerThe most common cause of melena in a dog’s stool is an ulcer. Other symptoms of canine ulcers include weakness, pale gums, loss of appetite and vomiting (sometimes streaked with blood).CancerBlood in the stool may be a symptom of cancer in a digestive organ or a bad reaction to cancer medication.Foreign ObjectIf your dog swallowed an indigestible item, it may be lodged in the stomach or intestines. X-rays can detect the item, and surgery will probably be necessary to remove it.Rotten FoodWhen dogs eat rotting food or bloody carrion, they may partially digest some of the tainted food’s blood and pass it as melena through diarrhea.Other DisordersDark, bloody stools can also be a symptom of several other internal bleeding dise
