Good insulins are the human Lantus and Levemir and the pet insulins ProZinc and BCP PZI. For those two human insulin it is best to get the 5 pack of 3 ml disposable pens via a 10 ml vial. Although per ml the vial is less expensive most cats will not use up a 10 ml vial before the insulin goes bad/becomes ineffective. The human insulin N/NPH is sometimes prescribed but only lasts 8-10 hours. Same for the pet insulin Vetsulin/Caninisulin.
Most of us here test our cat's blood glucose at home using a human meter. We test before each shot and periodically between shots. We record our reading and other info in a spreadsheet. See: http://www.felinediabetes.com/FDMB/threads/fdmb-spreadsheet-instructions.130337/
What are you feeding? A low-carb canned is best. No reason for a prescription food. Here is a list of commercial low-carb canned http://www.felinediabetes.com/FDMB/threads/shortcut-shopping-list-all-8-or-less-updated.117688/
Here is a link to home testing blood sugar http://www.felinediabetes.com/FDMB/threads/hometesting-links-and-tips.287/
How are you two getting on? Is there anything we can do to help you both? There's a good bit to learn in the early days and it can be quite overwhelming (and sometimes scary!). Let us know what you need and we can point you in the right direction.
Welcome Cate and Puss. Another Canadian here from Southern Ontario. This community has a wealth of experience and knowledge to help you and Puss manage the diabetes as well as most anything feline. It's a great group of folks eager to help in any way they can. I'm sure your head is swimming in questions so please join us over on the health board and we'll do what we can to help you as you master the steps to what we call the sugar dance.
Hello Cate and Puss from Southern or Central Ontario (I can never figure out which). Let us know a bit of history and post any questions or concerns in the Health forum. This forum likes questions.