Dogs with black poop

The main causes of black stools in dogs are: Firstly, feeding offal and other food, which can usually be changed after stopping the food. Secondly, the protein content of the food is too high caused by indigestion. Thirdly, bleeding in the upper gastrointestinal tract can also cause black stools. If owners can rule out dietary causes, it is advisable to take the dog to the hospital for a stool test to check for gastrointestinal bleeding.