I had to give Skinny 1/2 tsp 3 times a day of Kaopectate (cherry flavored) for diarreha. This was according to his weight of 8 lbs. and severity of the diarreha. I would call your vet first to comfirm doseage.

Before I would give your kitty anything for tummy, I would see if the fasting works . Actually I've heard the water the rice was cooked in is good source for tummy problems. Use those rice cooken bags that you drop into boiling water.