After catching her, I began misting her with water to clean her up and determine where she was wounded, which is when I noticed that she was bleeding from her nail. I didn't have any quikstop powder on hand, so I ended up covering her foot with corn starch to try and stop the bleeding.
Unfortunately, since she had previously been misted, the front of the poor hen is now caked with corn starch

The hen is now sitting in a hospital cage in a quiet room with a heat lamp, food and water. She's lost a lot of blood if the amount I had to wipe off of her and the cage is any indicator.
I thought about cauterizing with a match, but the bleed seemed to be coming from under her nail, like it was torn at the bed rather than the tip and I didn't want to have to burn her toe. I have no idea how this injury happened.
My question is, for whoever may know, is how long on average does it take for a bleeding nail to clot and heal?
Second question is when will it be safe to wash off the cornstarch from her foot and front? I feel awful that her feathers got caked because I was so desperate to try and stop the bleeding.