died about 6 years ago). The vet told me when I first got them at two weeks old (orphans) to feed them good food to keep them healthy once they got off of kitty formula. Food like Iams or Science Diet (his words). I was broke but spent the extra money on these foods because I thought they'd really make a difference. Several years later one of them was diagnosed with diabetes. The vet told me that Science Diet has a special diabetes formula. So though it's even more expensive and I have to go to the vet to get it, I start buying it. My kitty got 2 insulin shots a day for several years. He did pretty well, but ultimately had a lot of other health issues and he died at 10 years old. :(
A year or so later, my other cat (always a more robust and healthier cat than his brother) starts showing signs of diabetes. So I bring him into the vet right away and get him started on a new insulin treatment that was intense but meant that he only had to have shots for a few months. My vet (new to the practice) says that he's a specialist in feline diabetes and has done tons of research. He comes right out and tells me that Science Diet diabetic formula is crap and, in fact, cats should not be eating dry food at all. Cats are carnivores, not omnivores like dogs or humans. The amount of filler and carbohydrates necessary to make dry cat food are, in his opinion, a big reason why feline diabetes is running rampant. They just don't need grains and other carbs. They need meat. Unless the dry food is essentially jerky, it's got a lot of things that aren't meant to be a big part of a cat's diet. Even a lot of wet foods have rice, vegetables, and other carbs. You have to look for ones that are mostly meat, or make your own.
There are some options out there, you just have to do some research. I was getting my cat a frozen food called Country Pet that wasn't outrageously expensive, but Whole Foods stopped carrying it and I have to order it in bulk. But my freezer is tiny and can't fit 16 rolls of the stuff. Too bad because he really liked it. Here's a link:
http://www.canz.com/countrypet/catfood.htmlBy the way, my cat is 16 now and doing great, and his new diet has a lot to do with that.
Lastly, I seem to remember when all that news broke about pet foods being poisoned that Science Diet and a bunch of cheaper brands were all made in the same place, which makes me even more wary of their "superiority".