Schroedinger's cat is a unique special monster that is only generated in the possession of a Quantum mechanic. Quantum mechanics have a chance to be generated with a large box and Schroedinger's cat will always be generated INSIDE the first Quantum mechanic to be generated with the box. No further mechanics will be generated with the box or Schroedinger's cat. It is the only monster that is generated in a container. If Schroedinger's cat is dead, you can reanimate it using turn undead. Schroedinger's cat is otherwise identical to a housecat.