Could you identify if she is an Aracauna or an Ameracauna?
Most likely she is an Easter Egger, often marketed as Aracauna or Ameracauna by the hatcheries, any store that sells hatchery birds, and anyone who bought those birds and sells them or their offspring.
Lots of pecking at night and they have a very balanced diet; veggies, layer feed, fruits etc.
How big is your coop, in feet by feet? Pics would help. Free range is great but the coop is the bottleneck as they have to spend the night and even some days in there.
Fruit and veg can dilute the minimal nutrition in the layer feed, depending on percentage of feed protein and amounts involved.
How long have you had the newbies?
How did you integrate them?
Integration Basics:
It's all about territory and resources(space/food/water).
Existing birds will almost always attack new ones to defend their resources.
Understanding chicken behaviors is essential to integrating new birds into your flock.
Confine new birds within sight but physically segregated from older/existing birds for several weeks, so they can see and get used to each other but not physically interact.
In adjacent runs, spread scratch grains along the dividing mesh, best if mesh is just big enough for birds to stick their head thru, so they get used to eating together.
The more space, the better. Birds will peck to establish dominance, the pecked bird needs space to get away. As long as there's no copious blood drawn and/or new bird is not trapped/pinned down and beaten unmercilessly, let them work it out. Every time you interfere or remove new birds, they'll have to start the pecking order thing all over again.
Multiple feed/water stations. Dominance issues are most often carried out over sustenance, more stations lessens the frequency of that issue.
Places for the new birds to hide 'out of line of sight'(but not a dead end trap) and/or up and away from any bully birds. Roosts, pallets or boards leaned up against walls or up on concrete blocks, old chairs tables, branches, logs, stumps out in the run can
really help. Lots of diversion and places to 'hide' instead of bare wide open run.
This used to be a better search, new format has reduced it's efficacy, but still:
Read up on integration..... BYC advanced search>titles only>
integration
This is good place to start reading, BUT some info is outdated IMO:
http://www.backyardchickens.com/a/adding-to-your-flock
