Wow, and I thought my vet was ignorant!
At least yours was smart enough to recommend Lantus! Mine wanted us on Humulin N. Luckily I read here and learned so much.
You vet doesn't seem to know much. . . just listen to the folks here and pretty much forget about your vet. I mean. . . they told you to stop insulin for a week? Insane.
What dose are you on now? I started on 1/2 unit, twice a day. We are about to ramp up to .75 or 1. I'm not sure yet, I'm waiting on advice from the people here on my next step.
What happened with your cat is they put you on WAY too high of a dose. Luckily it didn't kill her.
I'm surprised you're having trouble with the shots. My cat doesn't even notice. I mean, seriously, she doesn't even notice. At all. I got her some freeze dried chicken treats for after her shot, but mostly I can do it while she's eating her canned food (which she loves).
She didn't much like the ear testing but she got over that quickly. I'm not sure what you mean about "cartridges."
You don't use the Lantus pen like you would on a person. Instead, you use it like a vial. Buy some syringes u100 (preferably with 1/2 unit markings), and draw up out of the Lantus pen with it. Don't ever shoot anything back into the Lantus pen.
there are lots of good youtube videos showing insulin injections, blood testing, etc.
this website is amazing! You can also learn about what low carb food to use. WE were on a low carb diet for about a week or so before I got my insulin, but they say to be very careful making both changes at once. You've got to test test test. Go buy a Relion Confirm or Relion Micro monitor and get to testing!