"Mikesndbs" wrote in message
...

The knock-on effects are serious, too. The lack of hawks mean that
there is nothing to control the collared doves and pigeons - cats
fatch a few, but not enough to affect them. And it is even possible
that the cat population is one of the CAUSES of the increasing urban
and suburban rat problem, by competing with (and occasionally killing)
stoats (and, of course, killing weasels, which can kill young rats in
their runs).

What's the problem with collar doves and pigeons?

Mary