I'm having deja vu reading your post about your kibble addicted furry companion. I went through this with my girl who refused to even consider wet food edible at all from the ripe old age of 10 weeks old. She would not touch it and even tried to bury her brother's wet food as if it was waste. I eventually gave up after many months of standoffs when she was young.
Needless to say, when she was diagnosed with diabetes, the battle to switch her started all over again with exactly the same results only now I had a cat who HAD to eat in order to give her insulin. My cat would not eat any people food at all so my attempts to trick her with tuna, sardines, salmon, oysters, poached chicken, steak, pork, parmesan cheese, crumbled dried chicken treats etc. all failed dismally. I tried just about any food that didn't crunch and every trick known to man to no avail. I have scratches in my kitchen wall attesting to her protests!
The best I could do was get the lowest carb kibble possible and just keep trying. Eventually after a year or so, I pretty much gave up the daily battle and it became a less frequent stand off until one day, I'm assuming when hunger got the better of her, I caught her with her face in her brother's dish cleaning up his wet food leftovers. I immediately went back to holding standoffs with her and only gave her kibble if and when I had no choice because a shot was due or her BG was low. She is now on a diet of wet food only.....no kibble at all. I'm totally convinced that with some of our cats, you have to let them think it's their idea not yours. For well over a year, once transitioned to wet food, my girl would eat only one flavour of wet food. She has finally developed a far less fussy palate and will eat a small selection of different foods.
While I don't have any magical trick to share with you (wish I did), the first thing I would do is get the lowest carb kibble you possibly can. If you are in Canada, the lowest carb kibbles available are Instinct Ultimate Protein (14%), Instinct Original (15%) and Go Fit & Trim (14%). I believe the Acana is somewhere in the 18 to 20% carb range.
You can lead a horse to water but you can't make it drink and to think you can , will only drive you crazy. Just keep trying but know that insulin dose can be adjusted to accommodate whatever diet your cat will eat and your first concern is to make sure your cat gets enough calories daily to keep him healthy.
