my original chickens,6 are still around, discovered that pecking my shingles was alot of fun. it was on my deck so i was limited to what i could block them with. they would figure out a way to get at it everytime. so i just gave up. if im outside ill spray them with a water bottle, but otherwise, i ignore there pecking. even my pitbull, a sad looking little girl whenever the chickens decide they want to hang out with her, doesnt bother them at all. thankfully my newer chickens dont find it as much fun.