The problem we had with hawks verses chickens was not so much the big hawks in our area, it was the smaller size hawks which were fast and efficient. They would swoop up a baby chick as fast as a cats eye wink, (so to speak, AND GONE) lol Without a good yard dog and 'sometimes' with one, an occasional fox would catch a chicken coming off the roost. Possums and Coons were in 'abundance' at our home as well and seemed to prefer climbing a tree at night to fill their need. (I suppose location may play a part in chickens as well as bees?} Taken in consideration of the numbers of predators available at a location and how quick a good yard dog may be. Tojo the half German Shepard half Bull dog, was Johnie on the spot! Tojo eliminated many predators. With Tojo around a predator was taking his life at its own risk, if it had chickens on its menu at 'his' (Tojos') place! lol
Phillip