Hello and Welcome to BYC. Glad to have you join our poultry lovers community.
I sincerely hope your little girl pulls through. I have 2 pullets in a little clinic coop setup after being attacked by much larger roosters. They will make it ok. Your little chicken needs a lot of TLC to help her get over the shock of the attack. Others posters above have given advice that is very good and I won't repeat it now.