What's new pussy cat?

Not this one:

http://timesofindia.indiatimes.com/world/mad-mad-world/Notorious-Oregon-attack-cats-violence-scares-off-new-owners/articleshow/36964042.cms

This is a nice sounding noun phrase, feline hyperesthesia syndrome, to explicate the aggressive behaviour of this cat.

But for me, it tells me that his embedded behavioural engram of AGGRESSION has gone completely awry.

He needs massive doses of Valium to calm him down.

The alt is to put him down.

Question:
Which is the better to do - for human's sake.