In message , John
Rumm writes
Owain wrote:
geoff wrote:
Its not a question of not allowing them, its a matter of how do you
stop them
tasteless
Electric fence along the edge of the roof.

Cow catcher type of scraper at the entrance to the tunnels! ;-)


I was thinking that, but tunnels are rare - they cost money, and not
required by the terrain



--
geoff