Question number 1 to ask your vet. Has she used this food with a diabetic cat?
If so, what did it do to the blood glucose levels and the insulin needs for a diabetic cat?
Looked up the information for the Hill's Biome food. I had never heard of it before.
Sounds to me like your vet is forgetting about William's diabetes and is trying to find a food to help with only the pancreatitis. What sort of testing has your vet done for the GI issues and the suspected pancreatitis? Was an fPLI test done? Was a full GI panel of blood tests done?
The Hill's website did mention several conditions their various digestive care foods are supposed to help.
Acute gastroenteritis, colitis, diarrhea, constipation, pancreatitis, irritable bowel syndrome, exocrine pancreatic insufficiency, small intestinal malabsorption.
But that list of medical conditions are not specific to this new Biome food.
Here is the ingredients list for the dry food version:
Chicken, Brewers Rice, Chicken Fat, Pea Protein, Wheat Gluten, Whole Grain Corn, Corn Gluten Meal, Ground Pecan Shells, Chicken Meal, Cracked Pearled Barley, Whole Grain Oats, Dried Beet Pulp, Chicken Liver Flavor, Pea Fiber, Flaxseed, Dried Citrus Pulp, Fish Oil, Lactic Acid, L-Lysine, Choline Chloride, Potassium Chloride, Pumpkin, Pressed Cranberries, Fructooligosaccharides (FOS), DL-Methionine, Taurine, vitamins (Vitamin E Supplement, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Niacin Supplement, Thiamine Mononitrate, Vitamin A Supplement, Calcium Pantothenate, Riboflavin Supplement, Biotin, Vitamin B12 Supplement, Pyridoxine Hydrochloride, Folic Acid, Vitamin D3 Supplement), Psyllium Seed Husk, Calcium Sulfate, minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), Mixed Tocopherols for freshness, Iodized Salt, Natural Flavors, Beta-Carotene.
With all those grain products, I can't imagine it would help William's diabetes at all.
Here is the ingredients list for the canned food version of the Hill's Biome food.
Chicken Broth, Chicken, Pork Liver, Carrots, Rice Starch, Wheat Gluten, Spinach, Ground Pecan Shells, Rice, Chicken Liver Flavor, Flaxseed, Soybean Oil, Potassium Alginate, Whole Grain Barley, Dried Citrus Pulp, Fish Oil, Dried Beet Pulp, Calcium Chloride, L-Lysine, Natural Flavor, Pumpkin, Pressed Cranberries, Powdered Cellulose, Guar Gum, Dicalcium Phosphate, Choline Chloride, Oat Fiber, Potassium Citrate, Sodium Tripolyphosphate, Fructooligosaccharides (FOS), Calcium Lactate, Calcium Gluconate, vitamins (Vitamin E Supplement, Thiamine Mononitrate, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Niacin Supplement, Menadione Sodium Bisulfite Complex (source of Vitamin K), Pyridoxine Hydrochloride, Calcium Pantothenate, Vitamin B12 Supplement, Riboflavin Supplement, Biotin, Folic Acid, Vitamin D3 Supplement), Taurine, Psyllium Seed Husk, minerals (Zinc Oxide, Ferrous Sulfate, Manganese Sulfate, Copper Sulfate, Calcium Iodate.
Again, lots of grain and starch sources in the canned version too.
The Hill's US website actually listed the carb content, on a dry matter basis. -
For the dry food version 36.1% carbs, 35.8% protein, 18.5% fat, 4.5% fiber
https://www.hillspet.com/cat-food/pd-gastrointestinal-biome-feline-dry
For the canned food version. 33.1% carbs, 37.3% protein, 19% fat, 4.5% fiber
https://www.hillspet.com/cat-food/pd-gastrointestinal-biome-feline-ckicken-and-vegetable-stew-canned
Personally, and this is only my opinion, I don't think the Hill's Biome food is a good choice for a diabetic cat.
But then, I'm always a bit skeptical of food promoted by a pet food manufacturer that can only be sold by a veterinarian or at a vet office or clinic. Profit motive is the reason I'm skeptical of this type of pet food marketing.