The flock has been mostly peaceful up until three days ago—one of my Golden hens (Violet), began chasing my rooster (Not-Curley) and pecking the back of his head. Right before she does it, she makes an odd growling vocalization, sticks her head straight out, and puffs up her feathers until they stand on end like quills. She'll chase him until she loses sight.
In response, I believe Not-Curley has "herded" all the light-colored hens into the other aviary section. Now any time he catches sight of one of the Goldens, he'll chase her until she leaves "his" side of the aviary. My situation allows me to segregate two groups with plenty of space, and I've got "Quail Jail" set up preemptively.
My main questions are: What usually causes a hen to become aggressive? and Which one of the two should be placed in Quail Jail while I rearrange all their "furniture?"
In response, I believe Not-Curley has "herded" all the light-colored hens into the other aviary section. Now any time he catches sight of one of the Goldens, he'll chase her until she leaves "his" side of the aviary. My situation allows me to segregate two groups with plenty of space, and I've got "Quail Jail" set up preemptively.
My main questions are: What usually causes a hen to become aggressive? and Which one of the two should be placed in Quail Jail while I rearrange all their "furniture?"