The strips for the AT2 meter are expensive which is the main reason why most folks here use human meters.
The strips for the AT2 meter are made by Abbott. The AT2 strips are identical in appearance to those used in the Freestyle Freedom Lite and Freestyle Lite human meters. After doing considerable research by calling both the human and animal divisions of Abbott, checking patents etc., I am 99.9 % sure they are the same strips. The human meters do not require coding, the AT2 meter does. So the strips being sold for the pet meter have all been batch tested to determine which of the codes on the AT2 meter will produce the most accurate readings. There are 4 known cat codes for the AT2 meter. There may be more but these are the ones we have seen here.
So while I am not advocating doing so, there are folks using the Freestyle Lite strips in the AT2 meter. You stand a 25% chance of getting the most accurate readings possible based on there being only 4 cat codes. The other 75% chance is that you will get a close but not as accurate as possible reading. The folks using the FS strips in the AT2 meter have indicated a small difference in readings in the neighbourhood of approximately 5% by cross checking AT2 strips with FS strips.
If you choose to go this route, it is imperative that you have your AT meter set on one of the cat codes (known codes are 08, 37, 38, and 93) to get a reasonably accurate result. Do NOT use the code on the FS strip vial as that is for use only with older FS human meters.
It is also imperative that you keep some AT strips on hand to do baseline checks of your results with the same drop of blood, each time you open a new vial of FS strips or alternately, use AT2 meter control solution to ensure the strips are readings within the expected range. Also double check any unexpected or low FS strip readings using an AT2 strip with the meter on the correct code for that strip.
All meters have an allowed variance in their results of up to +/- 20% and using the FS strips in the AT2 meter adds another variance into the picture so your results, while in the ballpark, may not be as accurate as is possible.