My past non-diabetic kitty did not like Churus but loved Delectables and they have some in non fish flavored ones that I bought for her.
My past diabetic kitty, I would buy a lobster and cook it for his Birthdays, and I would buy already cooked large shrimp and slice them thin and give him maybe 2 shrimp for a treat. He also loved cooked steak sliced thin, and fresh boiled chicken breasts (he didn't like them as much once they were leftover and refrigerated). No seasonings ever added.
My current diabetic (acro kitty), I give him (and his non-diabetic "little sister") freeze dried 100% meat sirloin beef, chicken breast, and salmon from Life Esentials Cat-Man-Doo which I buy by the pound when possible to save money. My cats love them.