What would cause my normal acting barred rock hen to go absolutely nutso, when I introduced a turken hen to the flock? It was worse than a rooster fight. Ms Henny Penny ripped into this bird and blood was apparent. Couldn't find an injury on the turken nor Ms Henny Penny. It was right at dusk, so all the chickens were in the pen for roosting. Ms Henny Penny spotted the turken and it was on. I also intorduced a EE hen at the same time, and noone even paid attention to her. The turken may be a tad bigger than Henny Penny. I just was not expecting that behavior at all.