Hi and welcome to Lantus & Levemir Land, the nicest place you never wanted to be.
It's wonderful that you are home testing. It's the best way to keep your FD kitty safe.
To do TR, it's best if you can get at least two tests in each cycle, and more when you can. Always get a pre-shot reading, to be sure it is safe to give insulin, and then a test somewhere mid-cycle, depending on your schedule. More tests are always good - no such thing as too much data. If testing on the ears is an issue, you might see if Ti-Mousse will let you poke the pad of his foot.
TR recommends a starting dose of about .25 units per kg of weight, so that would put you at about 1.25, if you decide to switch. You hold the dose for 6-10 cycles, unless kitty goes below 50 on a human meter/68 on a pet meter, which earns a .25 reduction.
There are other low carb foods besides Fancy Feast, but some are pricier and I don't know what is available in your part of Canada. Have you looked at Dr. Lisa Pierson's website,
catinfo.org? There is a very helpful list of canned foods there that shows the level of carbs in may different brands. She also has a section on transitioning a cat from dry food, if you're interested in trying that with your civvie. Another possible solution to kibble raids is a feeder that can be programmed to only open for a specific cat - it works with their microchip. They are kind of expensive, but some people feel they are worth it.
Keep reading the info on the stickies here, keep posting and asking questions. We love to help!