What you might find helpful is this chart at: http://www.geocities.com/jmpeerson/canfood.html
Another great online source is pet food direct, as they list all the ingredients of foods, so you can browse until you find one you think would work without even leaving home. http://www.petfooddirect.com/store/brands4dept.asp?dept%5Fid=6&mscssid=1LCD430DSLJ09JV3KNX39KUB1WAW8915 is the link to their canned cat food department. They do sell Merrick, but I am not too confident on it being low-glycemic index food, as it has substantial amounts of vegetables, thus carbs (FYI, starchy vegetables contain almost as many carbs as grains - starchy veggies are corn, peas, potatoes - then there are high sugar veggies such as carrots, sweet potatoes, and winter squash - fruits are obviously high sugar): http://www.petfooddirect.com/store/dept.asp?dept%5Fid=6&brand%5Fid=704&mscssid=1LCD430DSLJ09JV3KNX39KUB1WAW8915 Here is an ALL MEAT canned food for cats and dogs, but it's JUST meat and water, you MUST add a good balanced cat supplement (or two) to make it complete (you will need to call the company and ask if it is WHOLE animals, or if it is muscle meat only, as if it is, you will need to add calcium to replace the BONES if they do not grind bones or add calcium, and you will need to add organ meat or an organ meat supplement if they do not add organ meat to the ingredients): http://www.petfooddirect.com/store/dept.asp?dept%5Fid=6&brand%5Fid=993&mscssid=1LCD430DSLJ09JV3KNX39KUB1WAW8915 another link, to the manufacturer's website: http://www.caninecaviar.com/felinecanned.html Here's a couple of supplements to make an all meat (no bones) diet balanced for cats: http://www.felinefuture.com/products//#whatistc Here are two more supplement choices for feeding with a MEAT (but no bones) diet: http://www.felineinstincts.com/orderNow/orderNow-idx.php#reg NOTE: You will still need to supplement with organ meat with these supplements (if it's not in the canned food), OR add THIS supplement IN ADDITION to the above one to make it completely balanced (this replaces the organ meat): http://www.felineinstincts.com/orderNow/orderNow-idx.php#chickliver There are others out there too, just search. I KNOW there is one more "grain free" canned food as well, but I can't find it now! EVO is NOT the only "complete" grain free cat food out there! Ahh, here we go... BUT they have 5% fruits/veggies: http://www.naturesvariety.com/content.lasso?page=1358&-session=naturesvariety:47A98A1909e3b3380AGtl2E8BE6F their main feline page with all products (including kibble and raw frozen): http://www.naturesvariety.com/content.lasso?page=1352&-session=naturesvariety:47A98A1909e3b3380AGtl2E8BE6F Phaewryn http://ucat.us/domesticcatlinks.html Special Needs Cat Resources