My broody Amer Game hen (Zoomer) is fierce too and that's putting it lightly! Whew she's mean towards everything right now! She went missing several wks back and we hoped that a dog didn't get her, we hoped that she was just broody somewhere. Yep, she was, she came back with TWELVE chicks in tow!
Now that she's in momma mode, she's meaner than a snake. She flares her wings out to protect her chicks constantly. She looks like a turkey when she flares her wings, it cracks me up everytime.
Check her flaring out here (she's trying to protect her chicks from the curious teenagers in the background):

Check her flaring out here (she's trying to protect her chicks from the curious teenagers in the background):
