I live in a city raising chickens but having troubles with Hawks coining and makind dinning with my silkies. I have other breed but so far the silkies (the smaller of the breeds) have been food. Any suggestions on how to deter silkie buffets? The backyard has a wonderful canopy of oak and ash trees but several openings are still available for the hawk. I currently stringing fishing line in most areas. Should I hand anything from the lines??