Not Argon. My beloved Angry Puss was PTS tonight. He had another unrinary blockage, and we had to make the difficult decision to euthanize. My heart is breaking, as this was my true heart cat. He had more personality than any 10 cats I have ever come across, and it kills me that he only had four years with us (11 total) Hopefully he is enjoying his Puss Palace in heaven right now. Pictures to follow when I can look at them without crying.