I use Living Clay - Detox Clay Powder to treat diarrhea with my dogs.
I take about a 1 tsp of clay powder and dissolve in 3-4 tbsp of water (puree consistency). Using a child's medicine spoon I pour the solution down the dogs throat. I tilt the dog's head back open its mouth and pour it in. Keep the dog's head back and stroke his/her throat to engage the swallowing reflex. Repeat for each loose stool, but be sure your pet is drinking plenty of water. You can add a pinch of salt to water to help them retain the water and want to drink more!