My mistake! I missed that you are using the AT. With AT, the reduction point is 68 and not 50 like I said. The normal range would be 68-120. The range with a human meter is 50-100. We'd like nadirs to be in 50-80 range (with a human meter) so that's where you would have seen that range.I'm a bit confused by the numbers. Since I'm using the AlphaTrak, I think I remember that 68 would be equal to 50 on a human meter. I've seen 80-120 as a cat's normal bg range. Before starting insulin, my vet told me to give syrup if under 80, and to test hourly if under 120. This seems like it may be overly cautious, and below 68 is when to be concerned. Is 120 on AT around the same as 80 on human meter, since I've seen the 50-80 range as normal here?