Hi Denine,
I had a problematic puker for years. In the past we did pepsid, steriods, again that triggered diabetes..... kitty has passed... well there were liver and heart issues too.
Fast forward, new kitty, he has alergies (upper resp issues), he has the runs... (at least he makes the box). So I've taken him to a holistic vet. We found him when one of the former cats had a back injury, and amazingly he heeled him up, instead of being on pain pills, that freaked out the cat or steriods.
Some of the digestion problems can be due to the lack of the cats ability to digest grains. He also has allergies to dust and storage mites. Our regular vet wanted to switch scooby to a single protein diet, we tried the duck, but no luck... so holistic vet suggeested the raw diet.
We switching to a to a raw food diet, a 2 days in, so far the box is looking better. To early to tell if it will work. Were hoping it helps with the runs. I will say.
You could try a probiotic/digestive enzymes by standard process: Lact-Enz. We just started the Feline Enteric Support (help with intestines).
The lact enz enzymes help digest the carbs, proteins, and help the gut with the probiotics.
The thing with any digestive enzymes, the cat has to eat that with the food. So, if the cat is a dry food grazer all day, it won't work if you give the cat the pill once or twice, he needs it in his system when he is eating to get the enzymes so he can break the food down. We just realized that.... so scooby needs to go canned regular w/ the enzyme... or the raw. So teh canned food, needs to have a capsule of the lact enz in it to help kitty digest the food.
We have a cereal eater too (currently duck and green pees since we were trying that, but it didn't help with scooby's issues). So, scooby can't have the dry, and we are seperately feeding them.
We got lucky with the raw food. Got some samples from one vet, and a pet supplies plus carries the raw less than 5 min away!!! The raw is fortified with all the nutrients, so, you store in the freezer. Transfer to fridge the night before the food you'll use the next day, then place it on the counter after fridge thaw, to get to room temp. cats eat ... toss after 30 min if stuff left over. Some people make their own raw, i'm not that adventurous yet.
My other vet doesn't like raw diets, because i've asked about them before, so I'm going to wait a few weeks before we go in for a re-check..