How old is he? Being hunched or puffed up with diarrhea, it might be coccidiosis. That is treated with Corid or Amprollium in the water. Dosage of Corid is 2 tsp/10 ml per gallon of water for the liquid Corid. The powder dosage is 1.5 tsp per gallon. Treat for 5-7 days as the only source of...