Frankly Tyler/John, your continued belligerence is testament to your ignorance of the use of dry ice as a means to euthanize.
Labs have been using dry ice for decades, and it is still considered by quite a few boards (as in group of people assembled to discuss laboratory guidelines, much like the AVMA) to be an acceptable alternative to compressed gas.
The AVMA is not law, nor do people that work in these fields consider it as such, however it is well respected, but not the final judgment on what is considered acceptable!
I really suggest before you continue to blubber about; that you do research about euthanasia and exactly why or how dry ice is rated for use as an inhalant.
I suggest for starters you begin with the IACUC handbook.
If you can find some references that do not directly quote the AVMA guidelines, you will quickly learn that using dry ice is still considered humane, and is in continued use in scientific circles around the world.