Hi Patti,
My Boo is an acrocat. There is an easy blood test that will give you answers. If you'll go over to the High Dose forum and read the stickies, there is a link to MSU (only place in North America that runs these tests). You will want both the IGF-1 and IAA. Your vet may try to talk you out of them, because many vets think acromegaly is rare. Just stand firm and ask them to do it, for your peace of mind.
I see in your history that Harley is prone to ketones. Because of that, please don't let anybody tell you to cut your dose, that maybe he's overdosed. Just get the tests done and go from there.