下一步醫生多半會告訴你是 IBD （inflammatory bowel diesease), 然後會上激素藥

prednisolone, 這樣貓會止吐，胃口會好，but with harsh side effects. 建議 change diet first and see if it helps. If not, and you must use steroid, use prednisolone (NOT prednisone). Prednisone is for dogs. Prednisolone is little less harsh for cats. Try not to overuse it. And once the symptom is under control, see if you can gradually wean your cat off prednisolone.