This worked for me once. Its an ayurvedic remedy, and didnt taste that bad.
Boiled rice mixed into natural yoghurt, splash of lemon juice and salt to taste.
Think the theory is the rice bungs you up. Yoghurt adds bacteria to your gut to help fight the cause of the poopeh. Lemon juice for vitamins, and salt to rehydrate.
Cured my week long trots anyhow.