The Reid wrote in
:

Does anything actually work at discouraging cats from using an area as
toilet? The product I tried had no effect (no need for shotgun type
suggestions, I don't hate cats).

A BB pistol firing soft plastic pellets and a laser sight is my favourite
way, gives me enjoyment, doesn't harm the cats who invade my garden to
annoy my rabbits, but gives them a good scare.

--
Tunku

"Caution : traces of irony and other metallic objects may be present in the
above post"