Most vets do not see people who test their kitties numerous times a regular daily basis. You are basically doing mini glucose curves each day so you have very good data on how Shelley is responding. With Caninsulin you need to look at both the preshot number AND the nadir. Also insulin absorption can vary from day to day with each kitty. The whole point is to get Shelley into good numbers BUT also keep her safe. A sliding scale is not a good choice for someone who is not testing or is only testing periodically, but you have a lot of data.
This is a guideline from the Caninsulin manual used by MSD
http://www.msd-animal-health.co.nz/binaries/CAN-350-2010_Caninsulin_Tech_Manual_Web_tcm51-37406.pdf
PAGE 6:
Blood Glucose Curve Results Recommended Action:
Nadir < 3 mmol/L Decrease dose by 50%
Clinical Signs of Hypoglycaemia Decrease dose by 50% Nadir between 3 – 5 mmol/L Decrease dose by 10% (Dogs) Decrease by 1 unit (Cats)
Pre-insulin blood glucose < 10 mmol/L (Dogs)
Pre-insulin blood glucose < 15 mmol/L (Cats) Decrease dose by 10% (Dogs) Decrease by 1 unit (Cats)
Nadir between 5 – 9 mmol/L and Pre-insulin blood glucose for dogs > 10 mmol/L Pre-insulin blood glucose for cats > 15 mmol/L No Change
Nadir > 9 mmol/L and Pre-insulin glucose values > 15 mmol/L If clinical signs present, increase dose by 10% (Dogs) Increase by 1 unit (Cats)