Welcome Serena and Susie from a fellow Canadian.
It sounds like you have not been home testing up till now, Home testing will make getting Susie regulated much easier and give you peace of mind. BG readings taken at the vet are usually elevated due to stress. There are not many cats who don't get stressed out at the vet and that stress can elevate their BG by 5.5 mmol (100 points US) and even more in some cases. This can lead to the vet prescribing too much insulin and too much insulin can look just like too little.
The Alpha Trak2 meter is great but it is indeed expensive to use and not necessary. Most members here use a human glucometer and all the reference numbers provided in documentation on this forum are based on the use of a human meter unless specified otherwise.
5 units of Lantus twice daily is a large dose and most cats don't require doses that high. It would be helpful to know just how quickly the dose has been raised to that level. What dose did you start at? How often have increases been made and by how much?
I encourage you to come join us over on the
Health Forum with any and all questions you have. It would be helpful if you would include answers to the questions above and expand your signature. The signature is a way to keep pertinent information about you and your cat available to anyone responding to your posts so we don't keep asking you the same questions over and over again and offer you information specific to your situation. You can include information such as your cat's name, age, weight, any other health issues particularly if kitty has ever had ketones or DKA, current diet, type of insulin and dose, and your general location. To edit your signature, hover your mouse over your screen name up in the upper right screen and select Signature from the menu that drops down. Type the info you wish to share in the text box and then scroll down and click on the "Save Changes" button.
Treating diabetes is a marathon not a sprint so please don't despair. Some cats get regulated fairly quickly and others take a bit longer. This is a wonderful supportive community and we can help you help Susie.
