Do they use human type blood glucose testing on cats? Whenever Talisker needed a blood test, for his Hyperthyroidism, they had to shave a patch of fur, so that they could find a vein, which was obviously a bit of a faff. With the blood tests I do on myself, I just use a lancing device on a finger, produce a tiny drop of blood (1mm or so in diameter is adequate) and put that on a test strip. Ten seconds later I've got the measurement.
Now, I suspect you'd need a reasonably compliant cat, or two people, to do that, but I don't know whether you could get blood as easily from a paw pad, given that cats walk on them, so presumably the skin's a bit tougher than on a human's relatively pampered fingers?
(This would also assume that the blood sugar levels measured in cats was similar to humans, but I'd guess that they wouldn't be too dissimilar).
Edit: Answering my own question: There's certainly some drive towards home testing of pets, since like humans, it allows better control of insulin and blood sugar levels, and consequently reduced risk of diabetic complications (although cats appear to be less prone to this than humans and dogs, lucky little furry buggers!). At least one site suggests that the best place to do it on cats is the edge of the ear, which I guess makes sense, since there's a lot less fur there than most other places on a cat, but a good blood supply.