Huge Swings. Any advice appreciated.

[MeltyCat]

I gave low carb wet food at 7:00pm.
Gave 2u at 7:30pm.
Gave dry meal at 8:30pm.

PMPS 23.4 (7:00pm)
+1 - 21
+2 - 14.7
+3 - 9.8

(this is usually where I start to get anxious)
At about +3.25 (10:45) I go test crazy.

10:45 - 6.2 (Ah! Dropping fast.)
10:55 - 5.4 (GIVE ALL THE TREATS)
11:05 - 5.8 (This is where I should have relaxed)
11:25 - 5.4 (no no no no no)
11:45 - 5.9 (Inner voice, he's been at 5 and change for over an hour and he's in great humor, it's time to stop freaking out)

Any suggestions on what to do to avoid this are much appreciated.

 

[BJM]

The lowest he can go safely is about 60 mg/dL or 3.3 mmol/L and he wasn't near that.
So,
Test
- if about his normal pre-shot, feed
- if way below his normal pre-shot, stall 30 minutes without feeding and go back up to Test until he is shootable or you decide to skip
Wait 30 minutes
Shoot - maybe 1.75 instead of 2.0 units, although he remained safely high enough so you could shoot 2 units
+2 feed some more
Depart
Come home
Test