Hi Ken, for most cats, I do not recommend that people shoot below 150. I think there are a small # of people who have shot at lower #s like that, but with cats that are VERY predictable and known to zoom into higher #s very quickly. Sometimes I do shoot Bix at 130 - 150, but that is because he is a hoverer rather than a zoomer, and will sit in #s for a long time before reaching a shootable #, which is not the case with most cats that I've seen here. I don't shoot every 12 hours with him, and I do use a sliding scale. I do not shoot him if he is in non-diabetic #s (I have once or twice around 120, but later thought better of it!).
To get the eyes of the people who have had success with what you're asking about, you might want to try a more specific subject line, and also you might need to post in other forums, maybe Health, or Think Tank if it's a generalized question about can low shooting be done safely with PZI. I'm not sure if the people who have done that check the PZI forum regularly or not.
Robin, I don't think you SHOULD be shooting on those lower PSs! As far as I have been told 150 is the lowest no-shoot level anyone should have with PZI. If someone goes lower than that, it is very much at their own risk, and hopefully only being done when they really know their cat and know that strategy works for them. So far, I don't see any need for it with Harley. The only case IMO is if you get a slightly low PS (over say 130) and don't have time to retest and are leaving for the day and it's a choice of whether to shoot or skip the shot. In those cases I think a token dose, maybe 1/2 or 1/3 of what you might normally shoot seems appropriate. To me the goal with that is not to even try to hit green #s, but just to keep some insulin in his system to tide him over to the next shot. Harley doesn't usually really zoom fast, so basically I would stay away from it. I don't think it's a case at all of your being scared of it, I think you have been taking appropriate steps to be conservative with your dosing and gather data to be sure what you are doing is safe. As long as Harley is doing well and you don't have ketones, there is no need to push yourself to be more aggressive than you feel comfortable with. If I've pushed you, sorry

, my bad!