I would specifically read this part of the catinfo.org website:
http://catinfo.org/?link=urinarytracthealth
There's more issues with dry food than just the carb count. The larger problem with any dry food is that it is moisture depleted and causes chronic dehydration in cats, which in turn causes kidney and urinary tract disease. Cats evolved in the desert and do not have thirst drives like dogs and people do. They must have moisture in their food because studies have shown that they never make up for the loss of moisture in their diet at the water dish. Diabetic cats already have added strain on their kidneys because of the diabetes; it's a good idea to relieve that strain as much as possible by keeping them properly hydrated through their diet.
Also, some diabetic cats can go into remission from eating the lower carb dry foods like Young Again, but many cannot. This is because even though this type of food is low carb, it's not low glycemic. All carbs are not created equal, and dry food must have some type of (high glycemic) starch to bind the food togthether--otherwise it would just be a powder. Diabetic cats have different levels of sensitivity to these types of carbs--Bandit can eat canned foods at 9-10% carbs no problem, but if he even has just a few pieces of something like Young Again or EVO dry, his BG shoots up. If your cat is on insulin, it can present problems with regulation. If your cat is in remission, it can cause a cat to come out of remission and need insulin again. Unless your cat refuses to eat canned food, there's no reason to risk the potential problems feeding even a lower carb dry food. Your odds of remission are much better if you stick to a low carb, canned food.
I'm also starting to get seriously annoyed with Young Again, because they seem to be spreading misinformation about their food. While their dry food is lower carb than most dry foods, it's not lower in carbs than many canned foods, and cats that go into remission on it do not go into remission because of their specific food. They go into remission because the carbs were low enough for those specific cats; and if those same cats had been eating a low carb canned diet they still would have gone into remission. I would be curious to see how many of those cats actually stayed in remission. I helped treat a diabetic cat last year who went into remission on low carb canned food, and then her owner decided to introduce Young Again into the diet. The cat was fine at first, and then over the course of 3 months or so her numbers started creeping up and needed insulin again. Sure enough, after changing the food back and a short stint on insulin, the cat went back into remission. The food was a expensive experiment for her, which is why I wouldn't recommend it.
