I literally only used activated charcoal caps from Walmart with 1 cup Pedialyte and 1 cup bottled water. My pup tested positive for parvo yesterday but showed symptoms since Saturday. Charcoal had her back to normal overnight. Got meds at the vet but haven't given them yet, no diarrhea no vomiting or anything since giving charcoal. Poop is normal now, eating and drinking fine no iv or special diet just charcoal and Pedialyte.