Since as the chicks grew they scattered all over the place, and since there were over twenty of them, it was impossible to not be near one of her chicks. The yard became a war zone.
The first time I noticed it was when Russel-our fat old tom cat-was goobering around in the yard. He made the mistake of crouching and pretending to stalk one of the chicks. The frightened chick made one small distress peep and that's all it took.
You have unleashsed a summer of terror!
But the people and animals who lived through the episode still tietoe across the yard when Hawk is sitting on the woodpile.
Finally, my wife coming into the house; tomatoes she'd been carrying from the garden crushed all over her shirt, her hair a mess around the bicycle helmet she'd started to wear for protection around the yard, and anger in her eye.
My wife later said that I unleashed a summer of terror on us when I put the egg under Hawk.
When the grouse chicks grew enough to ignore Hawk, it made her forious to lose control.