It might make you feel more comfortable to do a curve tonight - is that possible? Get 2+, 4+, 6+....if there are any big drops at any of those times, you'll want to increase the testing intervals - yep, I know, no fun to stay up half the night with kitty - but this is a new low for you to shoot...let's hope he's headed for a nice surfing session tonight. It looks to me like he has no problem hitting the nadirs at 6+ and 8+ - cats are notorious for going lower at night too....so keep that in mind. Maybe get yourself ready for a pajama party...
Do you have plenty of test strips, medium and high carb food and karo syrup (or other liquid sweet stuff, like honey or maple syrup)...just in case in your hypo kit?