I also had problems with appetite after my J pouch was removed and lost 40 pounds. I opted for a BCIR since I strongly did not want an ileostomy. That procedure as well as the similar Kock pouch should be considered by those facing J pouch removal, especially if they have adverse feelings about getting a conventional ileostomy. My PCP suggested that I drink a high calorie nutritional shake like Ensure. In addition to that, I ate several extra small meals of foods that I could tolerate, including high protein foods such as chicken and pork. Soups with a high calorie count also were helpful. Three months after returning home, my appetite had returned and my weight slowly began to increase. With such a major operation, it takes time for your body to heal and adjust to your new plumbing.