If you shoot now can you work your way back to his normal shot time? It's best to just move the shot once a day for 30 minutes or twice in 15 minute increments.
Looking at your ss it appears you are home to test as much as needed. Can you shoot as Carla suggested until you are back on schedule? Having had DKA it’s best to shoot if you can adjust time.
If you can’t work your way back on schedule, skip and call it a fur shot. Tigger will recover. Just make sure to test for ketones if you cannot shoot. Shooting full dose is best of course.
Could you take off the 911, we like to save that for medical emergencies.