I have been using the Zoetis test strips reflecting a code on the bottle of 38 for cats. I just noted a bottle I recently opened has a code of 7 for cats. Is this correct or have I gotten a different item. Both bottles say for for Alpha Trak 2. Unfortunately this could be why Goma's bgs were beginning to look so good. Do I just change the code number in the meter for the different strip? I can't believe I messed this up again...I just thought the strips would all be the same. I did not realize there would be a different code for the same type strip for the same meter. Why would the company do that? They should know there are dummies like me out there. At my age I should know better than to assume anything.