Today dogs and I went out retrieve trash barrel about 1/4 mile away. On the return trip I could hear spatzies (English House Sparrows) calling from cover of Sumac raising Cain about a hawk that I could not see. About 50 feet past the Sumac patch in my mowed yard I could see the harem based around the house standing tight together and looking directly at the Sumac Patch. Rooster (gamecock) was standing front of the group. Dogs keyed on spatzie calls and ran at Sumac patch flushing a young (brown rather than bluish-gray of adult) female Coopers Hawk. Chickens stood tight as dogs followed hawk for about 100 yards before breaking off. A few seconds later I got into a location where I could see a subflock of American Dominique pullets that was hiding under cover of a wagon about 150 feet from the games. The pullets were vulnerable of the hawk pushed issue although dogs would have crashed party this go around. I could not hear alarm calls produced by chickens. Context similar to when I can hear chickens actually threaten hawk but those calls are not the type that carriy well.