Hawks are protected, you kill one- HUGE fines and maybe more. it's not worth it.
I don't know where op lives but here in Michigan that is a $1500 fine, per bird. nope..I'm good...I'll just keep my chickens in a tractor.
Build a large chicken tractor that is easy to move around the yard so they can still scratch and forage but won't be snatched up by a hawk.
I know it's more of a hassle than free ranging, but it's worth it. no losses and piece of mind.
it's illegal to kill or trap a hawk, they are...