Hi XXXXXXX~
The gold standard for treatment of digestive upset in a dog is fasting. Generally the diarrhea is acute (meaning it comes on quickly) and can be taken care of without much trouble.
If this were my dog, I'd fast her for 24 hours (providing she doesn't have any underlying diseases such as diabetes that require she eat every few hours). No treats, no food, nothing. You can leave a small amount of water available, but don't allow her to drink too much at one time (placing ice cubes in her bowl so that she can't gulp water will help).
After the 24 hours, I'd offer a bland diet of boiled rice and boiled hamburger (3 parts rice to 1 part burger) in VERY small amounts (perhaps 1/4 c every hour or so) for the next 24 hours. Once you start feeding the rice mixture, monitor the dog for recurring diarrhea. If the problem doesn't start again, you can begin slowly mix in her kibble over the next few days until you're back to just kibble.
If the diarrhea persists for more than another day or so, or if your dog becomes lethargic, begins to have bouts of vomiting or shows other 'unusual' signs, you should have her seen by a vet, just to rule out any sort of illness or parasite infection.
I hope this helps!!
Certified Veterinary Technician
Associates Degree in Veterinary Technology. State and Nationally certified.