I've had 2 cats with inflammatory bowel disease and believe that one progressed to digestive lymphoma. We didn't test as treatment wasn't going to be any different. B12 in addition to the pred is a good approach. I would add probiotics and digestive enzymes as these make it easier to digest and absorb food. I like the Animal Essentials brand. Wet food is easier to digest than dry. Small meals, more often. I was feeding Callie 6 times a day. I'd use proteins that he hasn't had before, avoid chicken and turkey, maybe even beef. Fish oil is an anti-inflammatory. Bone broth is wonderful stuff...either make your own or Honest KItchen makes a powdered version you can just add water to. It's also available frozen, I believe Whole Foods carries it. Also had Kobi on chlorambucil. It's a chemo drug. It really helped his IBD, but eventually he developed kidney failure and I believe it was from this drug. No other side effects though. However, he couldn't take pred....it caused congestive heart failure, so the chlorambucil was a last ditch effort. When we started it the vet and I figured he'd be gone within a few months if we didn't do something different. It gave him 18 months more.
Holly, Misty & their friend, Jake, the dog.
Onyx, Callie May, Maggie & Kobi forever in my heart.
Yes, I know I need a new signature pic...someday...