Hi Vivian, Just checking in on you and Oz and I'm with Donna - shocked at the low #'s. How are you both doing now?
The reason why we keep asking for reports on how he is acting is that each cat reacts to low numbers differently and each has their own threshold. For example, everyone laughed at me and Harley when we were on PZI because he was symptomatic for hypo in the 60s - he'd run screaming to the cupboard, open it, and dump out cans of food telling me to feed him already. Just yesterday, he jumped up on my counter, opened my upper cupboard where I keep the dry food, and tore into a bag and pigged out. When I came home at Noon and tested his BGs he was at 58.
I doubt that your meter (I use the same one for my little Molly) is wrong. What you've learned these last few days is that Oz may not be symptomatic for hypo and unlike me, you can't depend on him to alert you when he's going too low. If you are not home to catch this like you were this morning, it could have been deadly. Hypoglycemia kills. I don't like to tell people what to do but for this I am making an exception - you must test before every shot - because it's clear from your posts how much you love Oz and don't want anything to happen to him. (Climbing down off of the soapbox now. ;-) )
As for what we've learned from this, without a doubt now - even 1 unit is too high. Looking at his SS I see a slight pattern - he goes low, bounces into the 200s and then runs higher for the next cycle or two until the insulin resistance created by the lows wears off - and then he goes low and the cycle repeats itself. He needs less insulin. I think that you should reduce the dose to 0.5u tonight.
Are you using U40 syringes? They generally come with a red cap and say something like "for U40 insulin only" on the barrel. They are marked only in whole units. To measure 0.5u, you will have to eyball halfway between the zero line and the first 1 unit mark. If this dose works, and you find yourself measuring less than 1 unit doses on a regular basis then there is another way of doing it using U100 syringes but you'd have to buy new syringes and use a conversion chart. But first things first, we need to find a dose that will keep Oz safe and let you sleep at night and not be afraid to leave him alone when you have to.