You won't like it but the only way I know of is to kill them. Once you do this it seems as though others will not reinhabit the barn.
Dave Richie
----- Original Message -----From: JaJaxBob@...Sent: Friday, November 03, 2006 10:31 AMSubject: Re: [usdfregion4] pigeonsi purchased two fake owls and the pigeons built lovely nest quite close to the fake owls.