You could add about 1/4 tsp to each of her feedings. I would suspect the diarrhea is from the new foods she is trying. That is normal with diet changes. You could also try to give her a spoonful of plain yogurt to replace her belly flora or a small amount (a pinch) of acidophilus (probiotics) can be added to her food as well. That can be found at good health food or drug stores.
They are both cutie pies!!