I would put a call in to your Vet. I would not feed the dog
any food except water for 24 hours to give the digestive system a rest. After that some rice, chicken would be great in small meals frequently. No seasoning and rinse the fat. If your dogs behavior is not the norm I would see the vet sooner rather than later. Plain natural yogurt is excellent for dogs in moderation. I would not give it to the dog when they are having digestive issues. Some use hamburger instead of chicken, either is fine.
Hope your pooch feels better quickly!