If he'd thrown the 55 at +3, you might've needed to steer, otherwise, it was after the likely nadir and he was already on his way up.
Here are some glucose reference ranges used for decision making
using a human glucometer:
< 40 mg/dL
- Treat as if
HYPO
- At nadir (lowest point between shots) in a long term diabetic (more than a year), may earn a reduction.
< 50 mg/dL
- If before nadir, steer with food, ie, give modest amounts of medium carb food to keep from going below 50.
- At nadir, often indicates dose reduction is earned.
50 - 130 mg/dL
- On insulin - great control when following a tight regulation protocol.
- Off insulin - normal numbers. (May even go as low as the upper 30s; if
not on insulin, this can be safe.
> 150 mg/dL
- At nadir, indicates a dose increase may be needed when following a tight regulation protocol.
180 - 280 mg/dL
- Any time - The renal threshold (depending on data source and cat's renal function) where glucose spills into the urine.
- Test for ketones, glucose is too high.
>= 280 mg/dL,
if for most of the cycle between shots
- Uncontrolled diabetes and thus at risk for diabetic ketoacidosis and hepatic lipidosis
- Follow your insulin protocol for dose adjustments
- Test for ketones;
if more than a trace level of ketones, go to vet ASAP.