My aunt used to half fill the small pop bottles with water and swore the glinting coming from them freaked the cats out.Alternatively you may get one of these http://www.isoaker.com/Armoury/Analysis/1996/cps2000.html and sit and wait.
It worked for me and no pussies were harmed in the process, old tigger now walks the full length of the fence line of my garden.
My aunt used to half fill the small pop bottles with water and swore the glinting coming from them freaked the cats out.Alternatively you may get one of these http://www.isoaker.com/Armoury/Analysis/1996/cps2000.html and sit and wait.
It worked for me and no pussies were harmed in the process, old tigger now walks the full length of the fence line of my garden.