Thanks for all the replies!
Currently, Ubu is on 2.5 units a day of vetsulin. He was diagnosed 2 years ago, and has done very well on vetsulin, along with a diet of M/D dry and purina one dry mixed (he hates M/D, DM, and the like, hence the mixing), and fancy feast canned. I was hometesting until the strips ran out and the battery on the meter died (The strips, that's another issue. An expensive issue). Since losing my job, I just keep my fingers crossed that his bg stays steady, so far so good. Since I can't afford strips at the moment, I've been paying the vet $18 a month to check him. Yes, I know I should check him more often, but again, I'm about one unemployment check from being homeless, so I'm just making do for now.
I guess I got confused about prozinc vs. pzi. The vet wants him on prozinc, which I assumed was the same as the BCP PZI. Then I noticed that BCP is bovine, while prozinc is human. Which means I doubt my vet will okay me getting a sample of BCP.
I pretty much have 5 days left to come up with $130 for the prozinc.
This sucks