I don't think this will be a worry today, given Smokey's high numbers.
Lantus has to be given every 12 hours. To change the shot time, you can move the shot back 15 minutes per 12-hour cycle for a total of 30 minutes per day OR 30 minutes one 12-hour cycle per day. So, getting to the preferred shot times may be difficult. You have a couple of options.
1. You can give a shot tonight at 1:45 am. Friday, you would give the "morning shot" at 1:45 pm, then the "evening" shot 30 minutes early at 1:15 am. Saturday, "morning shot" 1:15 pm, "evening shot" 30 minutes early at 12:45am. This option involves a lot of late nights.
2. You can skip tonight's shot and start shooting at your preferred shooting time in the morning.
Before a decision is made about this, I'd like to see what other experienced members have to say.
FF and Friskies is just fine. So is the DM pate. It is the only one that is low carb but there is nothing special about it except the price. If the vet insists, buy a couple of cans. Open one, try it and then return the others for a full refund. Just tell the office that Smokey will not eat it regularly enough or not al all.
Now is the time for you to set up a spreadsheet and a signature. We are fairly data driven here and if there are problems or questions, the spreadsheet is the first place we look. All the information is in one place for you, us, and the vet. In a crisis, we cannot take the time to search and scroll through a number of threads. If you need help setting up either, there are people here who can do it in minutes. Just holler.
Now is also the time to start testing. There is good information here
also
Video I made showing how to test your cat's blood sugar is an excellent learning tool.
Geez
@Chris & China (GA) – you type really fast.