I strongly suggest you try to transition Cody onto a wet food diet. Here is a link to a great article that explains in more detail why this is so important for diabetic kitties. There is also a link (in blue text) called Cat Food Comparisons in the article that will take you to a list of tons of low carb canned cat foods.
www.catfoodinfo.org
One caveat, though: you absolutely
MUST be prepared to home test and monitor very closely while you make any food transition, especially when going from a high carb diet to a low carb one! When carbohydrate levels drop, so do BG levels; without careful and constant monitoring you cat can quickly become hypoglycemic, which needs immediate care and has the potential to be fatal. I am not trying to scare you, rather just provide facts that you need to know. Home testing and close monitoring can help prevent this from becoming a dire situation. There is a very good chance that your cat will need an insulin dose reduction, as well.
When I first joined here, a very well-respected member showed me how, by feeding dry food, I was throwing away my money on both the insulin and the food, as all I was accomplishing was sabotaging myself and my cat, while making very little gain toward ultimately helping him with his diabetes (Thank you again,
@BJM!). I was stunned to hear this, and took it very much to heart. I will be eternally appreciative to her for that wake-up call. I believe in paying it forward, so I hope this has helped you, at least , to some degree!