Well so far you have shot 1 unit when she was at 160 so we can feel confident in that. If she goes into green numbers I would probably only shoot half a unit (.5) at this point. If it’s closer to 50 though, we would skip the shot. If it’s closer to 100 then shoot .5 units. This is just guidance for now, while we gather data. Shooting a lower number always is predicated upon your ability to monitor the cycle and intervene if necessary. If you were going to be away from home then I am sure I would not advise shooting a green at this point. Hopefully she will not present us with this problem.
When in doubt, you can stall for 30 minutes (or longer) and do NOT give food. Then retest the BG to see if she’s rising on her own without the influence of food. If she is, then you have more confidence in shooting. Also remember that she then has some more time to rise before the insulin onsets and starts to lower BG — and she also will then have food to help stabilize numbers.