Hey Amber,
I don't really think that Meadow's going low only on the pm shots; the cycles during the day are too high and flat, so there's no reason that I know for every nite time cycle to go low.
I think when you are seeing a high flat cycle like Meadow's got, it usually means need more insulin, so if you are at 7u Lantus already, the tests are going to let you know something.
What I did was to print out the two sheets for the tests at msu, took them to my vet and said make the arrangements.
Here's the link for the acro one IGF-1
http://www.animalhealth.msu.edu/Bin/Cat ... st&Id=1401
Here's the one for the IAA
http://www.animalhealth.msu.edu/Bin/Cat ... st&Id=1494
Take a look at the two links and if you have any questions just ask.
I had to keep pushing my vet office because I wanted the tests done. They had not even heard of the tests, so I had to take them all the info and say call msu already! They finally did but said oh Shadoe is not acro, SHE DOESN'T LOOK THE PART. And they are right; she doesn't, got a cute as a button tiny face and head, small paws, etc. But the numbers don't lie.
When I look at the ss for Meadow, I think yup, looks like Shadoe did.
Anyways, the above are the links to any info your vet would need about the tests and any more needed can be had easily by your vet calling msu.