My little dog just finished treatment with Flagyl. She is only 4 months old, and she had a severe case of diarrea with blood and mucus, and her vet told us it was colitis!!!!! I couldn't believe it, but thank God, the next day after having her first dosage of Flagyl, she started having normal bowel movements again, and her apetite got back to normal. Now I am being very careful with what she eats, she eats only dry food for dogs, and nothing more. Of course everytime she sees us eating something like chicken or steak, she cries like a baby, but....I stick with her diet.
The vet told us, that it's true, animals can get IBD as well.
Hope your cat feels better.....
Christina