Glad to hear you are a cautious person. Rather err on the side of not giving R than giving it if you have any doubts for any cycle. I hope you do have a full stock of high carb food, karo/honey/syrup and plenty of test strips. A few other cautions for you:
- Aim for an R dose that lowers the BG about 100 points, no more. Any more and you'll likely set off a bounce. Typically we'd start with a 0.25U dose of R for the first trial. It will be trial after trial to learn about how R works in Pig and what is a good R scale for you.
- You want to time giving R so that the nadirs of R and L are not at the same time. Typically people start by giving it at L shot time. The "typical" R cycle onsets and +2 and lasts 4-5 hours. My Neko was not "typical".

But rather later. Know Thy Cat. With experience and data, people might shoot R a second time in the cycle, after nadir, and when the blood sugar is rising.
- Don't give R on a cycle where a bounce will break. That causes a drop and the R drop on top can cause yet another bounce.
- Don't give R on the cycle you increase Lantus.
- Monitor the initial few times for 4-5 hours after the R shot to learn it's onset, nadir, duration. Over time you can reduce the amount of testing to the key times.
- Develop a double check system when you are giving R and Lantus at the same time. We've had people accidentally give the Lantus dose worth of R.

I used L cartridges (pens refills) and R from a vial, so it was easy to see which was which. I've heard of some putting an elastic band on the R vial, using sticky notes. Whatever works for you.
- Be patient if you don't see R action in any given cycle. Sometimes just keeping the BG from going up is a positive. Some cats see action in the cycle following giving R.
- Learning what the R cycle looks like, and layering that on top of the Lantus cycle, will help you know when it's safe to give R.
- With acrocats, there can be times when the tumour is slowing down and the use of R counterindicated.
I know you don't know if Pig is IAA yet, but the antibodies can delay the action of the insulin. Similarly, they can release stored up insulin at random times - usually when it's most inconvenient to you.
Back to dosing on Lantus. When you are seeing yellow nadirs, it's good to wait 6 cycles before increasing. That gives the depot time to develop to that dose and give you a good idea what the dose can do. Once you do the 6 cycles wait, you can still do 1 unit increases. A phenomenon you can see shortly after a dose increase is something we call
New Dose Wonkiness. It can explain why numbers can temporarily go higher after the increase.