Thanks for all the input. We've been waiting 15-30 minutes after injection/feeding before giving food thinking that it will take some time for the food to get processed. Perry does not have problems throwing up, but is having problems maintaining his weight.
He was diagnosed in early January and has been on Prozinc since then starting at 1 unit two times a day, gradually moving up to 2.0, coming down, and is now back again at 2.0 units twice per day. I've been looking at many spreadsheets of other Prozinc users and notice that Perry is much more consistent in comparison. We usually only test at injection time, and then once during the cycle since the numbers rarely change.
As an example, last Saturday when we did more readings than unusal his numbers were like this
3/31/2012 Sat 6:00am 235 (2.0 units Prozinc)
10:00am 196
12:00noon 178
2:00pm 240
7:00pm 433 (2 units Prozinc)
The numbers at the injection time rarely vary by 30 points, but he never goes down much more than by 50 at his lowest point after the first injection. He gets low carb foods almost exclusively (lots of poached salmon and grilled ahi tuna and some FF and dry DM), but with 15 other cats in the household (including a CRF cat that is getting hi carb foods) he will get the occasional bit of the wrong food.
We've only seen numbers below 100 two times, both at the initial 6:00am test the first time he was at 2.0 units. We skipped the dose then and began to reduce, but numbers pushed into the 300-400s so we're back at 2.0 again with somewhat better results.
Regards,
Perry and his dad.