Dogs with sudden diarrhea often improve on their own, but a new specialized diet was tested to speed up recovery. The diet contained beneficial bacteria (Bacillus velezensis), fiber that feeds good bacteria (fructo-oligosaccharides), protective proteins from pork plasma, yeast, and a mineral that helps firm up stools. Dogs eating this special diet recovered in about 3-4 days compared to 6 days on a regular digestive diet, with 98% improving within a week versus only 66% with the control diet.