Why is BG spiking after having been stable?

Hi all,
Thanks in advance for any input. Daisy is almost 14, was diagnosed about 2 months ago. On Vetsulin, we have been able to maintain her for a while on a single unit in the AM due to diet change, and she was steady around 125-140's. This last week she has been steadily increasing and is back around 240. We haven't done anything different with the diet, and she is keeping these 200+#'s on 1.5-2 units 2x day. Her urine was clear from any signs of infection or crystal's.

Ideas???
I have downloaded the spreadsheet and will get that filled in today.

Thanks!!

 

Spreadsheet data will help us to help you. A kitty's insulin needs can change over time even if there's no other issue. How are her teeth? Dental problems are known boosters of BG level.

 

Callie's BG shoots up if she has a UTI.