Aliprowl, I think that's innovative, could work. Maybe you could just assemble some scarecrows - or "scare-hawks' - from old clothes. Of course, if your chickens are anything like mine, the mannequins will soon be dressed in chicken poo, since mine immediately hop right up into the chair I have out in our pasture (whether I'm sitting in it or not) or anything else that's a little elevated. If nothing else, the chair or whatever you have the mannequins displayed on will afford a little cover to dive under...