Hen Fighting -could fit in two groups.

[LuckyClucky434]

I am in need of some advice.
About 9 months ago I got "rescue" group of 8 mixed breed hens (Silkie, Leghorn and crosses of both) The issue I am having is with one of the 8 rescue hens. 7 of them have integrated flawlessly into my flock of chickens. I have a mixed purebred flock including polish, silkie, white and brown leghorns,orloffs, marans, orps, bramha, turken, cochin, australorp and a few other breeds. I have 3 roos - a cochin, a bramha, and a turken. I have about 75 birds total with another 20 chicks in the house.
My whole flock is free range on a large 200 acre farm though they usually stick to the barn yard and surrounding area. The inside space is 24x30. They have the whole barn to come and go from as they please (small hole in the wall of the barn). Feed and water is available 24/7 and I give daily treats. Chickens put themselves to bed.
The hen I have having issues with attacks the other chickens (hen or rooster) as soon as she sees them. She has and will draw blood on any of the birds. I am sure she would kill them or at the very least severely injure them. She attacks ANY bird not just a certain color, feather type or appearance. She is for sure a hen, as she lays 1 egg a day. She currently lives in a dog kennel/run where she can hear and talk to the other chickens but cant see them. If she can see them she will run/pace and jump at the bars to try and grab the other chickens.
I have tried placing her in the coop at night while everyone is sleeping. At dawn she was running my other girls all over the place/jumping them.
I originally tried placing the 7 in a dog kennel in the coop and she was the only one that had issues.
I have tried totally segregating her where she cant hear/talk/see the other birds but she goes totally depressed and stops eating.
She is between 2-3 years of age now going by what previous owner said and how long I have had her. Lays 1 egg a day, not broodie. She can see and hear.

 

[Nocila]

I've heard of a few different things that can be put on a bird's beak to stop it from attacking other birds. You could probably pick something up at your local feed store. I've heard that Vick's Vapor rub can also help, but I've never tried it first-hand.

You might also consider finding a new home for her. I've heard that sometimes, when a bird is aggressive in one home, when it is sent to a new home, it's behavior changes. I had one hen who was a bit aggressive for my flock, and I ended up giving her to someone who was looking for birds. I talked to him, and he said that he didn't have problems with aggressive birds, but that most of the birds he had received were given to him due to their aggressive nature...

 

[donrae]

I would cull her, myself. Part of living on my place is Thou Shalt Get Along with Others.

If you're determined to keep her, look into pinless peepers, several folks have had really good success with them.

 

[LuckyClucky434]

@donrae if it was totally up to me she would have been culled after the 2nd month.
Unfortunately I got her from a really elderly woman who loved her chickens dearly (The 8 are pet/huggable tame). She comes to visit 5 or 6 times a month. She would be heartbroken if I culled one of her girls.

I have the same rule - Everyone has to get along! I have culled birds before for not getting along. A scuff here and there is normal and bound to happen with 70+ birds, but with this girl...its not a scuffle.

How exactly do painless peepers work?

@Nocila The vapo rub is placed where on the chicken?

 

[Nocila]

I believe you rub the vapor rub between your hands, then pet the birds that are being attacked. You could also put it on the beak of the hen that is attacking the other birds, as an added measure. Birds hate the vapor rub, so when they peck another bird, and taste the rub, they quickly learn that pecking is an unpleasant process.

I've never had to use the vapor rub on my birds, so I don't know how well it works, but it's worth a try...