My vet told me that based on Neko's weight, it didn't make sense to test for high dose conditions until we got to 10 units. We never did - maxed out at 8.75 units. I had to ask the vet to humour me for the tests. The clinic owner thought I was wasting my money on the "exotic tests". Guess who was most surprised when both the IAA and IGF-1 came back positivie. Not me.
The most recent research on acromegaly is done at the Royal Veterinary College in London, England. Their recent study found that one in four diabetic cats has acromegaly. They were trying to screen these cats out of another study, so weren't looking for acros. They also found that the average dose for these acrocats was 7 units, with a range from 1 unit to 35 units. This
post here has a compilation of a bunch of articles on acromegaly. Post #7 by Julie contains the link to the article on the recent research on numbers of acrocats. There isn't a lot out there on IAA, but we do see it often enough that it's worth getting tested - and can change your dosing strategy. If you do get it tested and it comes back positive, let me know and I'll give you my collection of notes on it.