Frank's Mom, thank you. I suspected there was some kind of kickbacks involved. It just didn't make sense to feed higher carb food at 4x the cost, when everything I saw said to keep it diabetic cats carbs at 10% or under. I see you are feeding Frank during the day and overnight frozen. Does feeding more often help regulate his sugars better? Which kind Friskies pate are you feeding him? There's so many different kinds of wet food Friskies!
I buy the 32 pack cans of Friskie's pate...the classic, seafood, and I think chicken flavor ones. I'm still relatively new to this, so it's a learning experience, but I switched Frank to mostly canned food in January when I thought he was displaying signs of diabetes, to try to fix things on my own. Unfortunately diet alone did not fix him, but I know on dry food (even the prescription one) his sugar is much higher. He's very sensitive to carbs, I've learned, so as of now all dry food has been cut out of his diet.
As for the frozen food feeding, I like him having access to food in case he drops low and his body tells him he needs to eat, but he will eat everything in one go if it's not frozen. I saw others who were doing the same thing on here, leaving frozen food, and it seemed like a good idea.
As for canned food, stay away from anything that's "with gravy", because it is higher in carbs (but is good to have on hand for a hypo kit, should you need it). I believe that pretty much any pate is going to better than dry food, so buy what you can afford. The 32 can cases last us about 15 days and are $12.99 or $14.99, so I'm spending like $30 a month on food right now. I did email young again for a sample of their 0 carb dry food, to give it a try as well. If it works, I'll probably leave the dry out for grazing and the canned for 2 main meals a day...then I won't have to freeze food anymore.
There are others on here with much more experience...they might offer more info, but switching to a good low carb canned food and a super low card dry food prior to insulin is a great idea! That way if you need to start insulin, you don't have to adjust it based on a diet change WHILE you're giving shots.