In article , Tumbleweed thisaccountnever
writes
And how do you know there is no 'evidence' in your neighbours gardens?

We have two acres of garden and we've never known our cats to leave it.
Our neighbours have cats - and dogs, but they don't come into our place.
Train them, feed them, pamper them and they'll not wish to go wandering.
--
Alan & Joan Gould - North Lincs.