Can try home made remedies like this!
RECIPE for early onset diarrhea,
Pepto Bismol every 3 - 4 hours. (You will need a syringe... good luck!)
liquid pink Pepto 1/2 to a tsp each time, for every 10lbs of dog
PEPTO... still highly recommended by the vets. For puppies over 6 weeks old... (for younger pups, call your Vet)
2nd Day: (or first day with puppies)
Boil rice - 1 cup rice, 2 cups water, 1 chicken breast... the chicken flavor permeates the rice, when you cook it together making them LIKE to eat it. (You can use Rice Pablum). Feed ONLY the rice mixture, for the first day after fasting. REMEMBER, if your dog has secondary Diarrhea. Uncontrolled watery squirts, YOU MUST get fluids into him/her. This can be done by syringe, or intravenously.
Another vet recommends a little bit of low fat plain yogurt and a little bit of lot fat cottage cheese is added. CANNED Pumpkin is also known to help treat diarrhea.