Here is a food list. We try to stay in the 8-10% carb range.
http://www.catinfo.org/docs/FoodChartPublic9-22-12.pdf
Here are low carb treat ideas
List of Low carb healthy treats
by squeem3 » Sun Mar 14, 2010 2:34 pm
Real Food Toppers
Halo Liv-A-Littles
WildSide Salmon
Whole Life
Catswell
OnlyNaturalPet.com All Meat Bites
OnlyNaturalPet.com Freeze Dried Turkey Liver
OnlyNaturalPet.com Poultry Crispies
Bravo Pet dry roasted and freeze dried treats
Beefeaters freeze dried treats
Pure Bites
Cat-Man-Doo bonito flakes - Other brands are available in pet stores. Tip: If your cat loves bonito flakes, buy a large bag of it at an Asian supermarket. Asians use the bonito (tuna) flakes to make soup, particularily Japanese miso soup. A huge bag will only cost a few dollars and will last a long time. Be sure to check the ingredient label on the bag to make sure that only bonito flakes are listed with no other ingredient such as a preservative or salt.
Drs. Foster and Smith Liver Bites
Drs. Foster and Smith Chicken Bites
Drs. Foster and Smith Seafood Treats
Grain free freeze dried raw food such as Nature's Variety and Stella and Chewy's (new cat line coming in May. The dog ones can be fed to cats as treats)
Other low carb treats:
http://www.felinediabetes.com/low-carb-cat-treats.htm
http://www.felinediabetes.com/homemade-treats.htm
viewtopic.php?f=3&t=445
Anything that is 100% meat with nothing else is best. There are many brands you can feed. Check the dog treat aisle for meat treats. Some freeze dried RAW patties are great for treats, just make sure there is no source of grain or sugar. Catnip and cat grass are great, too.
BUT DON'T SWITCH food until you are hometesting. It can make a dramatic downward change in blood glucose levels and you want to know that so you can adjust dosage.