Brian,
Believe me, I have tried your approach...and it works well when I am onsite...but I can't be there 24/7 and the birds are smart enough to figure that out...and take advantage accordingly. It only takes being absent a day or two and they take over.... sometimes en mass. It is an extremely vexing problem. I have even considered hiring someone to patrol when I'm not onsite, but that can get to be very expensive. It is a serious problem for me and I would greatly appreciate finding a realistic solution.
