Welcome.
Good insulin 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 or cats 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/...te-a-ss-and-link-it-in-your-signature.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 cannedhttp://www.felinediabetes.com/FDMB/threads/shortcut-shopping-list-all-8-or-less-updated.117688/
Pet meter tests more closely resemble vet lab numbers.
However, we have human glucometer reference numbers in all of our guidelines.
A Walmart ReliOn Confirm or Target Up and Up will work just fine for most folks. There's no test strip coding and both only need tiny blood droplets.