The first thing that popped into my head when I saw this article (apart from the unpleasantness of disposing of an unwanted cat in such a terrible way) was the Schrödinger’s cat thought experiment.
In this case it isn’t whether or not the cat is dead, but the state of the body. Digested or undigested, they never knew until they opened the sack.
Nice use of ‘Death Sack’ in the headline too. Wonder what it was made of? Must have been pretty resilient to have withstood those sharky gastric juices.