Have you tried syringe feeding him?
Ask your vet for a 5 or 6cc oral feeding/medicating syringe. Puree some canned food like FF. I would probably use high carb gravy food because you are feeding a high carb dry diet, and I do not think you are home testing. Add some water if necessary so it becomes a thin liquid you can easily draw in the syringe. To restrain kitty, wrap him in a towel around his neck and chest like a bib, and put your knees over his back end and kinda sit on him to keep him from backing up. Use your index finger and thumb to open his mouth, kind of like putting a bit on a horse, and slowly dispense the food into his cheek, making sure he is swallowing it and not inhaling it.
Also - as you may have already learned, dry food is very, very bad for a diabetic cat. Most dry foods are 30-50% carbohydrates. Cats are obligate carnivores (strictly meat eaters), and need no more than 10% carbs (we prefer below 7%) in their diet. Feeding a cat dry food would be like feeding a diabetic human nothing but Twinkies and Coke. Feeding a dry, moisture depleted diet can cause all sorts of problems in their system in the future like urinary tract crystals, chronic renal failure (CRF), and nasty skin conditions due to wheat/corn allergies. And it will make managing his diabetes next to impossible. There are some dry foods that are low carb, but they can still cause blood glucose problems in cats because of their starch content. We recommend low carb pate style canned foods - really anything below 7% carbs on
Janet and Binky's food charts will do.
Also - are you hometesting your kitty? Home testing is the only surefire way to keep your cat safe and healthy. With home testing you will know your kitty's numbers and you will know that his insulin dose is right for him. Too high of a dose and he could go hypoglycemic and possibly die, too low of a dose and he could go DKA (diabetic ketoacidosis) which is also deadly. High blood glucose long term also causes damage to the body's organs and neuropathy of the hind legs.
To home test, you need to pick up a glucometer from a pharmacy or get one for the cost of shipping by clicking the "Home Testing Kits" image at the top of the page. Similar to how a diabetic human pokes their finger to draw their blood and test it, we poke the edge of our kitties ears (or paw pads if they are VERY stubborn) and test using the blood drawn from there. It is simple, painless, and by home testing and tracking the numbers you will be in control of your cat's diabetes and you will be able to make sure your kitty is on the tracks for being SAFE and HEALTHY.
If your vet tries to tell you home testing is pointless (most do) - ask them if a human doctor would EVER tell a parent of a diabetic child to shoot insulin blindly into their child without testing. NO - then WHY would we do it to our cats? A once in a while blood glucose test at the vets is NOT ENOUGH - blood glucose can be influenced by stress and vet offices are high stress places. That means the blood glucose levels your vet sees are artificially inflated by stress, and the vet will think your cat is not getting enough insulin, and likely drastically increase your dose. So when your cat gets out of that high stress environment (home) and his levels drop, you shoot that super high insulin dose into him, making it hypo, which CAN and HAS killed many unfortunate kitties. I am not saying vets are bad, but many of them just don't have the time or desire to do more research on FD because it is not a "normal" problem and that unfortunately results in many kitties being put on the wrong, outdated, and potentially dangerous treatment regime.
Those points aside, welcome to FDMB. You have truly found the best place for you and your kitty. It is a tough roller coaster ride of emotions but everyone here is willing to help and get you on the right track again. :smile: