Have you ever consulted a cat-behaviour therapist?

I've not personally ever used a behaviour therapist, but Peter Neville's book "Do Cats Need Shrinks" has great insight to their behaviour and I've found his advice to be very helpful on more than one occasion.

I don't know if it's the same in America as it is in the UK, but pet therapists here will only accept vet referral patients as they want to ensure that all possible medical causes have been ruled out first. If you haven't already asked your vet or local cat rescue if they can recommend someone, it's worth asking their opinion.

I would always recommend against the use of medication to treat behavioural problems because it only ever masks the symptoms and never treats the underlying cause. Unfortunately one of my cats died shortly after being prescribed Valium for a problem which the vet (unable to diagnose as a medical condition) considered might be a behavioural problem.

Cats are fiercely independent - you probably already know this, and a cat who is very aggressive, well that's the way he or she is. He or she can mellow out, but from experience the best thing to do with a cat that has this behaviour is to leave the cat alone - to not touch it unless it wants to be petted. There are techniques to make a cat more relaxed, but not to change its personality. I remember that a friend of mine many years ago gave her cat a minuscule dose of valium because he was so hyper, but that was not right at all and I was furious with her after I saw the cat all drugged up.

Here's a water therapy link.. you might find it interesting:

http://www.youtube.com/watch?v=ARXIttQPRK0

No

But common sense well tell you, you will get the same result if you get a wad of cash and flush it down the toilet.