On Jan 5, 9:25*am, "John" wrote:
Once a cat is thoroughly deterred it won't do it behind your back. Don't
credit it with such intelligence. Teach it to associate touching the wires
with some sort of shock - be consistent for a while and it will be trained.
If you look on youtube (Slug on Electric Fence pt 2) theres a two wire
electric fence which means both wires have to be touched to get a
shock. It would get helluva surprise but not as much as 240v.

On a similar subject theres an interesting show on Thursday BBC4, 9pm
The Brain: A Secret History.
http://www.bbc.co.uk/programmes/b00xccs9

Dave.