We live out in a rural area and have always seen the hawks flying around over our neighbor's chicken coop. Our neighbor has even had them kill some of his chickens. But we've never had them over our property until we got Daisy. We now have the hawks circle extremely low over us. We own a ranch house and they fly over as low as the roof! I think they are just awaiting the opportunity.
We keep her on a leash at all times when outside as a precaution.