As a traditionally trained holistic veterinarian, I have has success using holistic, natural therapies
for cats with IBD.
We use a home made diet(1/3 lean protein such as a chicken breast, or lamb, salmon, veal, turkey, duck; 1/3 long acting carbohydrates like sweet potatoes,or any kind of potato, rice, pasta or oatmeal; 1/3 veggies like broccoli, cauliflower, green beans, peas etc. Cook it up and mix together, add a little (1/2 teaspoon) extra virgin olive oil.