Only if you either keep them inside or in a small enough yard to completely cover it with netting. Otherwise,it sometimes works to keep a couple of good roosters, encourage crows or blue jays which will harass them and/or use scarecrows. Under no circumstances can you harm them.
I'm not usually bother by hawks except as they migrate through this time of year. Yesterday my wife came running to tell me there was a hawk after our chickens--they were free ranging all over about 2 acres. I ran out in time to get a glimpse of either a goshawk or cooper taking off through...