Teresa,
I'm probably making the switch to Lantus as well and plan on getting the pens. I've heard about too many wasting the vial, which is more expensive anyways

. I have read Lantus is more schedule strict and instead of our 1 hour Prozinc flex window, Lantus seems to be 15 minute flex window, which I have to figure out how stalling might throw it off

. Obviously, there are going to be a couple people who work 12 hour shifts so they can't strictly stick to the 12/12 schedule but it is perceived to be less ideal. Since Buddy is approaching 6.0U of Prozinc, my thoughts are that you wouldn't need to start him at 1.0U but maybe half like 3.0U starting dose for Buddy.
*Please let someone else confirm my thought*.
I arrived at this idea because Maury is on like 2.2U and Vet told me I should start him on 1.0U (about half his Prozinc dose), so that's where that came from. Also, I'm planning to buy from Mark's in Canada. Vet already wrote a script for Maury. There is also a guy in Supply Closet that sells Lantus pens, I think Alan Hamman is the main one. The other guy, Ramon Vargas passed away.
I'll try to help where I can since we're kind of in the same boat