Thanks everyone. JS, Lexy is now on Humulin N. We're up to 2 doses a day now and we're not seeing much of a reaction. I've had the Karo Syrup on hand and haven't had to use it yet. She gets a little tired about 6 hours or so after the injection but she's pretty bouncy back and no major lethargy to note.
She's been very vocal with me, her water consumption is almost back to normal again and her litter tray activity has been normal. An no more being sick. We've been migrating her onto a high protein, low carb diet, some very good brands here that provide for this without being exorbitant and she's taken to it well. She's still a little wary. Vet came round this evening to check up on her and see how she was doing, so she was not happy with me. The vet did tell me that its still early days. A reaction, if she does have one, may not happen fast with this insulin as it did with the other. So we'll keep monitoring.
The vet made a great observation, and he says that whilst he has no proof, he has made an observation that there is a common denominator in all the cats he has treated in the past that have contracted diabetes, including his own cat. They had all at one time suffered some kind of trauma (whether man made or accident). Especially as there is no concrete proof as to what causes diabetes (so many factors can do it), that its tough to rule out a trauma that may have impacted the pancreas and as a result diabetes has occurred. Not something I will spend much time pondering but I found it interesting.
Anyway, we're about to get ready for our dinner. Just wanted to send an update, haven't wanted to post much until I knew what she was doing.