Very nice numbers!
Just one suggestion for you - when you see a number like you did last night - Billow went from 253 to 154 - you may want to set an alarm and get up and check on her again in a couple of hours. Kitties love to go lower at night - and with a nice big drop like that, she looks like she was on her way to the lagoon (green numbers). So for safety sake and so you'll have more data - and are hence better prepared to make dosing decisions, please get a late night reading when you see falling numbers.
Hope this is helpful!