Here's a great food recipe for dogs with Colitis. It comes highly recommended by breeders and rescuers.
Upset tummy diet and for bouts of colitis:
This diet is ok for 1 week or so but long term use should have more
vitamins and nutrients added via supplementation. I can help you with
that if needed. You should switch back to kibble gradually and hope that
they will still eat it after this treat ;-)
Cooked white rice (not long grain as it is harder to digest)
Canned pumpkin (not pie filling as it contains sugar)
Boiled chicken with skin removed
Large curd cottage cheese (not nonfat)
Acidophilus powder, probiotic or digestive enzyme which I give daily to
help digestion of kibble but during this time it is a necessity to
repair the flora of the digestive tract. You can get Prozyme at most pet
stores, acidophilus at health food stores (should be in the refrig
section). If you are looking for a great one to use daily (it does help
with boxer gas!) go to
http://www.b-naturals.com and it is called
Berte's Probiotic Blend.
Do not add water to meals during this time
I would feed about 1-2 cups of white rice and 1 cup chicken twice a day.
Add a heaping 1/4 cup of pumpkin and 1/4 cup of cottage cheese per meal.
The amounts of rice an chicken will vary by the size of the dog. Better
to start with less and see how the system reacts.