Our roosters are free range and unfortunately, they now have a habit of perching on our new porch railings. Every day I have to hose the entire porch down because of their droppings! We just built them a new rooster coop [the hens have their own fenced in coop and run] and there is even a new roost in it. So far, they won't use it! And it's been below 30 severals times the last few weeks. Is there any kind of animated large bird decoy that I could put on the porch? What would keep them off the porch, owls or hawks or something else? HELP!