You will need to clean out the area. Gently wipe away or rinse of with a syringe. Cover with antibacterial cream. Do you have any idea how it got like that? Any peices of wire sticking out anywhere? A hen might have done it as well. Isolate her to prevent others from pecking on the wound...
I can't see the place where it is bleeding from, can you post another photo a little closer up and push the feathers out of the way so I can see it better? The fluid might be leaking out because it hurts to keep her vent tightly closed so she might be keeping it slightly open, allowing the...