Introducing a single bird is the hardest introduction and tends to produce the most violent of reactions. Everyone knows that this bird is a stranger, everyone is desperate to keep this bird below them in the pecking order. All are firmly convinced that with the new bird there will not be enough feed to go around.
If you bird was bullied before, unless she has grown a great deal and is very close in size to the other birds, she will more than likely be bullied again.
Your best bet is to pull another bird out of the flock. Put this bird with the one you already have, let them get a pecking order worked out one on one. Then reintroduce the pair, at the same time pull your most dominant bird, or your top two. This will mix everything up, and might let the lower birds get a toe hold into the flock. Later add back the dominant pair, which will shake things up again.
However, there is a very strong possibility that this bird will be targeted even with all these strategies, some birds just don't fit in a flock.
Mrs K
