Stacy asked for other experienced eyes in case Sienne and Gill don’t see the tags.
First, please avoid increasing the dose based on the PS.
Lantus is a depot insulin meaning one shot builds upping the previous. It is not an in and out insulin like the shorter acting insulin. While there are some forums that shoot sliding scales with Lantus, we don’t do it in this forum as we’ve found the cat’s generally do better when the dose is consistent.
Do you have any data from the last two weeks in December? Do you check his urine ketones every single day?
We don’t normally do rebound checks (lower the dose to see if the cat is overdosed) as that can put them at too high of a BG. However, he is clearly overdosed....we just don’t know by how much because of the frequent changes in dose. If you have any data from the last two weeks in December, it would be really helpful in us determining a good dose for him.
I’m rather leaning toward a recommendation to shoot 0.5u, keep a really close eye on his ketones, and get as many BG tests as you possibly can but I’d like to see any other recent data you have. If we do suggest you reduce and you decide to do so, if he doesn’t have a green BG once he clears the bounce, we can get his dose back up quickly, if need be.
We do have to be cautious about taking his dose down too much due to the DKA history but if you check the ketones and let us know if you even see trace and if he eats, drinks, and isn’t lethargic, then he’s ok. If he starts to go off his food, acts lethargic, doesn’t want to drink, or shows even trace ketones, we need to know right away.
As
@Stacy & Asia said, a 28 and 39 is dangerously low on a human meter and even more so on an AT. We need to sort this out so that doesn’t happen again. Are you up for it?