Hi there, am in Devon and my cat has just been diagnosed with diabetes and we, too, are on Caninsulin. I posted on the special Caninsulin forum and there are people out there who respond quickly and with loads of experience, so they might be able to help with your numbers. (Thanks Tracy).
Issey's numbers with the Caninsulin start off around 16.8 at 8am, then after 4iu (I know, a high dose), she is still at around 5-6 12 hours later. This is only after 10 days of jabbing (and from three glucose curves done in the vet on first diagnosis - my monitor has yet to arrive, so admittedly have been shooting in the dark for a week, although a jab at the vet at noon on Friday showed a figure of 11, so I guess on track) so am hoping that now we are settling in to a routine the vet might be able to reduce that dose and see if she stays lower on, say, two doses of 2iu a day.
But it's all a really confusing time, isn't it? And until I found this forum I had no idea there were different types of insulin available for cats, or that some are on the "human" types, such as levemir (my friend's daughter is a type 1, so I know a fair bit about diabetes in humans and the regime!).
Good luck - will be interested to see how you are getting on!