Thank you for the information. Many kitties will show higher numbers at the vets due to stress, so the glucose readings your vet gets may not be accurate. Hometesting is much less stressful (and cheaper) than having it done at the vets office. If you test before each shot and then a few hours afterwards and if possible a few hours after that when possible...(I believe I saw that you are using Novolin)...you will get a good picture on how well or how fast the insulin works and how low it can bring the numbers. Often if the numbers drop too fast or too far the kitties numbers will "bounce" up higher because of counter-regulatory hormones the body releases causing stored glucose (glucogen) to be released, since the body "thinks" the higher numbers are normal and tries to keep them there. It can take a while for the body to get used to being in more normal numbers. So if a test were done at the vets when your kitty's numbers were bouncing it would look like more insulin was needed when in fact the same amount or even less may be called for. Home testing and setting up a spreadsheet will be valuable tools to see what is really happening.
I have 2 diabetic kitties....neither one of them was "excited" about starting to have their ears poked for the testing, but they both got used to it and don't "hate" me. One even walks over to the test mat and sits down to wait...he knows he gets either a meal or a treat after and he is VERY food motivated. My other kitty ( who is the more difficult one) will sit quietly when I do the poke, but I have to bring her to the test area...she walks away when she sees her brother being tested

She likes cuddles and brushing so that is her "treat" after testing. If your vet were diabetic you better believe they would test before each shot and several times during the day to monitor glucose levels. People can tell when they are feeeling "off" when the glucose numbers drop too low, but our kitties can't tell us and going into hypo numbers can be very dangerous, expensive to treat and sometimes deadly if the numbers are too low and it is not noticed. Home testing is the best way to keep our kitties safe as well as see how well the insulin and dosage is working.