Wow, the things one learns on these support groups! I have never heard of dog grass either. Anyway, I have a few possible red flags:
Dog/couch grass/quick grass is considered to be a diuretic. Since diabetic kitties (as well as kidney kitties) have trouble properly metabolizing all of the excess water they drink, I would think a diuretic would make dehydration a possible issue. But, maybe there's not that much of the grass in the product.
Plus, here's a quote from:
http://www.mountainroseherbs.com/learn/dog_grass.php
"Precautions
Dog grass is toxic to birds. It may also lower blood sugars in people [cats too?]. The August 2005 edition of the Journal of Ethnopharmacology published a study noting a potent blood sugar lowering effect of this herb in rats. Dog grass does not stimulate the release of insulin, but it appears to make cells much more sensitive to insulin, at least in the laboratory. Make sure you monitor your blood sugars if you are diabetic and take this herb. Prolonged use may cause low potassium levels in the body."
While lowering blood glucose is not such a bad thing (less insulin used or your kitty), it does mean you really need to stay on top of your home testing. Additionaly, the reduction in potassium greatly concerns me, as low potassium will cause symptoms very similar to diabetic neuropathy. Again, maybe there's not so much of the ingredient that it would be an issue, but I'm just attempting to bring it to your attention as a possibility. However, if your cat has high potassium, certainly, the food could be a way to reduce kitty's potassium levels.
I like the rest of ingredients except for the shrimp. The issue with shrimp are twofold: (1) It adds phosphorus (if kitty's kidneys are at all problematic, not good), and (2) shrimp are bottom feeders. Most of the shrimp we see in the supermarkets these days come from Thailand, Vietnam or Mexico. All of those locations have extremely polluted ocean waters due to a number of reasons, one of which is improper sewage outfall and lack of oversight. I don't purchase any shrimp (or fish for that matter) that doesn't come from the pacific northwest.
However, maybe there's not that much shrimp in the ingredients to worry about. But, it might be worth an email to the manufacturer (along with the excellent suggestion above to get the proper nutrient analysis) to determine just how much shrimp is in the product.
It also seems to be very high in calories for a food that is so high in protein, so I wonder where those calories are coming from. Hmm.
Don't want to rain on your parade, but it is a very unknown commodity with some possible issues. I could be completely off here, though, and I am very open to anyone else negating what I'm stating.
Good for you, though, to keep researching to find a better product. However, I do believe there are much better high quality protein products on the market that are known quantities.
Hugs,
DZ and Sarah