In message , Janet Baraclough
writes
If it did work, one would expect that where the dumped panthers/
cougars have established themselves (Bodmin moor, parts of the
Highlands), it would be very hard to persuade a domestic pet cat to
leave the house, let alone crap in the garden.. AFAIK, this is not the
case.

Janet

A friend just back from digging in the Negev (archaeology, not
gardening) saw what is supposed to be the last leopard in the area: all
the others have succumbed to some disease carried by domestic cats, on
which the leopards had been dining ...

--
Klara, Gatwick basin