Almost all dry food is much higher in carbs than is good for diabetic cats. We recommend feeding only wet/canned cat food which is 10% carbs or lower. A lot of people feed Fancy Feast pates or Friskies.
Have a look at this link and choose food that is 10% or less carbs.
https://catinfo.org/docs/CatFoodProteinFatCarbPhosphorusChart.pdf
Are you home testing the blood sugars? It is VERY IMPORTANT that when you swap over to a low carb diet that you are testing the blood sugars to ensure that the blood sugars do not drop too low. Low carb food will drop the blood sugars up to 100points. If they do drop,the insulin dose may need to be reduced. Test before giving every dose of insulin to ensure it is safe to give the dose and test about 5 hours after the dose if you can so you can see how the dose is affecting the BSLs. We base the dose on the nadir.....the lower point in the cycle which the insulin drops the blood sugar.
She will continue to be very hungry until her blood sugar levels are more under control. You may need to feed her a bit more food.
If you would like us to help you, could you set up a spreadsheet and put in all the BSLs you have been taking. Here is the link. If you have any trouble setting it up, post and someone will help you
http://www.felinediabetes.com/FDMB/threads/fdmb-spreadsheet-instructions.130337/
Also if you could set up your signature, which you do by clicking on your user mane in the top right corner of this page, open it and click on signature. In it write name of your cat, and your name, date of diagnosis of FD, insulin type and dose, meter type, any other illnesses, medications, diet and where you live.
Ask lots of questions. We are here to help you.
Bron