Welcome to the FDMB Stacie! Sorry to hear about Tigger's diagnosis but with proper treatment, diabetic cats can live a long and healthy life! Some even go into remission!
You're probably right about the prednisilone. Has your vet discussed trying to wean her off of it?
Here's some basic information but please ask any questions you think of!
Successful treatment of diabetes has three main steps.
The first is diet. A diabetic cat needs to be eating a low carb canned or raw diet. You don't need any special "prescription" foods either! There's nothing magic about them that treats diabetes. Many of them are too high in carbs (especially the dry ones!), and the ingredients tend to be low quality, too! Most of us feed our own cats Fancy Feast Classics, Friskies pates or 9-Lives ground because they get less than 10% of their calories from carbs. They are also easy to find and affordable.
With IBD in the mix, you may need to look into a novel diet. The "prescription" food your vet has you on is actually too high in carbs and there's actually nothing special in it that treats diabetes. You're paying a premium price for a food with inferior grade ingredients and a well advertised name. Good news is it's 100% guaranteed so you can return it! Most of us just told our vet that our cat wouldn't eat it.
Changing to a low carb canned or raw diet can be enough for some lucky cats to become regulated but since you're already giving insulin, any diet change needs to be done slowly and while you're home testing.
Reducing the carbs in the diet can drastically reduce the need for insulin.
Next is insulin. ProZinc is a good insulin for cats so hopefully it'll work well for you! The one thing we do see here too often is vets that start at too high a dose and then increase too much, too quickly.
It's good that your vet started you at a reasonable dose but watch out for big dose changes! Increases should be done in .25 to 0.5 unit increments.
Last, and not least, is home testing. Many vets don't even discuss this with their clients, for varying reasons, but if you had a diabetic child, you would test their blood sugar before every shot, and we should do the same for our furkids.
Also, testing done at the vet's office can be unreliable due to stress, which can significantly raise the BG. By testing at home, you get more accurate results.
Most of us use a human meter from your local pharmacy because it's accurate and affordable to use. A favorite in the US is the Relion Premier Classic from WalMart. The meter is only $9 and the strips are $17.88 for 100.
There are "pet" meters, but the strips for them are about $1.00 EACH which is too much for most of us when we test at least 4 times a day (more if they're running low or dropping fast)
Testing before every shot, you make sure it's safe to give insulin at all. By testing in between shots, you learn how the blood sugars are responding to treatment.
We have a special spreadsheet we all use to record our test results that's a very valuable tool too. Here are
instructions on getting the spreadsheet.
Keep asking questions! The people here are very generous with their time and we all want to help your "extra sweet" Tigger live a long and healthy life!