Another test after that 47 is strongly recommended. When you get a low number (under 50), you want to increase frequency of testing, approx. 20 minutes, and feed again, to make sure you are safely above 50, then retest in 30-40 minutes to make sure he stays there. It can happen that the carbs can wear off, and numbers can drop again under 50.
- Depending on how carbohydrate sensitive your cat is, feed approximately a teaspoon or less of gravy from high carb food or high carb food only. (If you have a cat with GI issues, using a couple of drops of syrup plus low carb food is an alternative.)
- Test again in 15 – 20 min. Depending on the numbers, give more HC food.
- Repeat the above steps every 15 – 20 min. until your cat tests in the 50 mg/dL (2.8 mmol/L) or above range for 2 consecutive tests. Continue to feed in small amounts to keep numbers in a safe range.
- Test in 30 - 40 min. and repeat the test and feed process until there are 2 consecutive tests where numbers are stable or rising.
- Test in an hour and follow the same steps.
DO NOT become complacent. If numbers have risen after one or two tests, it’s important to continue testing. Numbers may bobble up and down as the HC food and/or Karo wear off. DO NOT get one test where your cat has risen from low numbers into the 50s and go to sleep
https://www.felinediabetes.com/FDMB/threads/dont-panic-or-how-to-handle-low-numbers.210109/