Addendum to what Larry posted.
All meters sold in the US must read within + or - 20% of what a lab would get.
We do not adjust the readings from human meters; we ask you to note in you signature what meter you are using.
We have reference values for human meters, so that is not an issue in most cases. Many of us in the US like the WalMart ReliOn Confirm, Confirm Micro, or Prime meters. If you're not a fan of WalMart, you can to our shopping partner Americal Diabetes Wholesale and purchase the Arkray Glucocard 01 or 01 Mini which are the unbranded version of the Confirm models made by Arkray USA.
Comparing a human glucometer to a pet-specific glucometer is like reading temperature in Celsius vs Fahrenheit. Both are correct. You just need to know the reference ranges to interpret what the numbers mean.
[Glucose reference ranges are unsubstantiated and have been removed by Moderator]
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Examples of using the chart:
Ex. You are a new insulin user and you test your cat before giving insulin. The test is 300. It probably is safe to give insulin.
Ex. You are an established user of Lantus, following the Tight Regulation protocol. You've tested around +5 to +7 to spot the nadir. It is 200 mg/dL. You probably need to increase the dose, following the instructions for the protocol.
Ex. Your cat is acting funny. The eyes are a bit dilated. You are concerned and test the glucose. The number is 35 mg/dL. ACK! The cat may be in a hypoglycemic state. You quickly follow the HYPO protocol linked in the glucose reference values chart. (which we really, really, suggest you print out and post on your refrigerator.)