Cute!
I don't see or really hear anything concerning.
Are these from feral/gamefowl chickens that are in HI?
Yes, she's smaller, but she's moving well and foraging. Likely keeping a distance for a reason since she may be slightly weaker. If they are GF then they establish the order fairly...
Welcome To BYC
Can you get a video of her and how she sounds/moves along with the other chicks?
Upload video to youtube and provide a link.
Where are you located in the world and how are the chicks housed?
This one is staying isolated from the others, are they bullying her from food/water?