I have 4 NH reds hens that are 2 years old. I recently "received" a Buff Orpington that is 6 months old and just starting to lay. The Orpington is larger then all of the other birds already.
Faced with challenge of integrating the new girl into the flock, I decided to put her in a small coop within the run. Here she is protected from the others, yet they see each other all day long.
It has been 9 days now and I decided it was time to see if they were ready for the assimilation.
I released the Orpington into the run and within seconds all 4 of the reds where on her. Literally, jumping on her back to try and hold her down while they pecked. They all attacked together. No blood was drawn as I broke it up before it could get that far, but a lot of feathers where pulled out.
I am looking for advice on what to do next. She has to join the group as some point, and most of what I read tells me a week of "see but no touch" is the recommended approach, but obviously, all this did was to cause the older girls to think "just wait till you get out". I have read that the first introduction can be vicious but the thought of all 4 attacking relentlessly seems beyond what I would be expected even when teaching her the pecking order.
The Orpington seems much more even tempered then the reds and seems surprised that anyone would go after her.