Originally Posted by Eventide
It is against the law for vets to use freezing (other than liquid nitrogen as mentioned above) as a method for euthanasia.
It may not be against the law for a veterinarian to perform a reptile euthanasia via freezing, however, since the American Veterinary Medical Association has determined that it is inhumane to do so, there could be consequences for a veterinarian doing so. If they were reported, they may be called before a board and reprimanded. Repeat violations could jeopardize their license.