Hemorrhagic gastroenteritis (HGE) is a disease of dogs characterized by sudden vomiting and bloody diarrhea.
Suspected causes include abnormal responses to bacteria or bacterial endotoxin, or a hypersensitivity to food.
[2] Pathologically there is an increase in the permeability of the intestinal lining and a leakage of blood and proteins into the bowel.
[1] Profuse vomiting is usually the first symptom, followed by depression and bloody diarrhea with a foul odor.
Other potential causes of vomiting and diarrhea, white foam from the mouth include gastrointestinal parasites, bacterial infections including E. coli, Campylobacter, or Salmonella, protozoal infections such as coccidiosis or giardiasis, and gastrointestinal cancer.