Hi and welcome. I'm sorry your kitty has been diagnosed with diabetes, but you've come to the right place. It's good that you are transitioning him to a low carb wet food. Try doing it slowly, mixing the new food with the old and gradually increasing the new while decreasing the old. If that doesn't work, post again for more suggestions. Are you using insulin yet? If not, then go ahead with the switch in food now, but if you are, then you need to home test Skions BGs to be sure it is ok to give the insulin. A change in food can lower his glucose and you'll need to adjust the insulin dose. And don't forget to take a deep breath. It is a scary diagnosis, but is doable and everyone here will help you along, just ask any questions you have.