Cold Temperatures

[Proteus]

I read in this article that nine cats survived to temperatures as low as 12,5 through hypercapnia and hypoxia. I understand that this reduces oxidative stress, which can no longer be controlled by the body when it's chemical activity has been so far reduced, to an absolute minimum, but doesn't the body spontaneously break down through its entropy? Or is the entropy so reduced along with the temperature that it is no longer very significant? Aren't there reactions needed to keep the tissues from falling apart by themselves? I have the feeling I'm overlooking something. I'm not sure how long the cats survived at this temperature, though of course it can't have been very long.