So receptionist or the vet tech was telling you this information?
Let me address these responses from your vet clinic one at a time, ok?
1. Home testing- she said I was confusing myself with all the numbers, that an 8 hour reading every 7 days is all that's necessary.
1. AAHA Diabetes Management Guidelines absolutely disagrees with what you were told. Home testing is the best way to see what is going on. Perhaps email a copy of the AAHA guidelines to the office? Drop off a copy when you go in to get your cat's vet records? Here is the link to those guidelines.
AAHA 2018 Guidelines for Managing Diabetes
2. That there is no correlation between infection and a rise in BG.
Ah really? Partially correct, partially wrong.
The high BG levels make the "patient" (human or feline) more susceptible to infection.
Here are a couple of article links about humans and infection and BG levels.
https://www.endocrineweb.com/news/diabetes/16186-link-between-high-blood-glucose-high-infection-risk
https://www.diabeteswellness.net/sites/default/files/Illness and Diabetes.pdf
General information article on feline diabetes from Cornell University, College of Veterinary medicine.
https://www.vet.cornell.edu/departm...ormation/feline-health-topics/feline-diabetes
3. It's not a big deal that he's on 5 units twice daily and still high BG - She said we just needed to keep increasing.
Some cats can have high dose conditions, such as IAA (Insulin Auto Antibodies) or acromegaly. Acromegaly is much more common than once thought. There are tests for both of these high dose conditions, but the only place in the US that does the blood testing for these is the University of Michigan. Special handling and shipping is required to get the blood samples there in a timely manner and in good condition. We recommend that cats get tested when the dose gets up to around 5-6 units per cycle.
4. Switching to Prozinc from Vetsulin was a mistake.
Not in our experience. Nor in studies quoted in that AAHA article. Prozinc lasts much longer in cats than Vetsulin. Vetsulin (aka Caninsulin) was developed for DOGS. (canine=dog) These AAHA consensus guidelines came out in 2010 and were updated in 2018. Perhaps your vet clinic is not a member of the AAHA and has never seen this information?
5. There's no such thing as remission. They are diabetic for the rest of their life.
True. But there is such a thing as being diet controlled. Wink managed that "remission" status, off the juice, no insulin, diet controlled only, for the last 4 years of his life. Plenty of other cats on here have also gone into "remission" or diet controlled status. Cat number 450 just celebrated their OTJ (off-the-juice) status yesterday, over in the Lantus ISG group.
https://felinediabetes.com/FDMB/threads/otj-party-for-kittencat-today.236157/#post-2647486 Many more cats then are listed there have gone into "remission" on other insulins and before this list was being maintained. Cornell article even calls it remission.
6. She said to just call next Wed @ 8 hours and tell her the reading and she will check with the Dr. for how much to increase.
I can see why you want to shop around for a new vet after that experience. Ideas on vets in your area may get more responses if you put a post in the Feline Health forum, specifying what you are looking for and what area.
Here are some vet interview topics for you. It's another one of the many threads to be found in the Health Links/FAQs' forum.
Vet Interview/Screening Topics & Check List
Hope at least some of this helps you.
I wouldn't suggest upping the dose by a full unit. Perhaps a 0.5U increase again tomorrow? Are you up for that?