Does Blood From Losing Teeth Give Dogs Diarrhea. Always check with your veterinarian before changing your pet’s diet, medication, or physical activity routines. Such blood loss is indicated by decreases in the total red blood cell numbers and pcv of the sample.

Tumors growing in a dog's rectum can cause bloody feces and diarrhea. Bloody diarrhea is especially concerning for dog owners since blood is not a normal part of feces. Such blood loss is indicated by decreases in the total red blood cell numbers and pcv of the sample.