Is she limping on it? Did she get it caught in the floor boards or in some wire fencing? I would clean it up and apply some Betadine to the toe. It might be painful right now, but in a week or so you could trim 1/8 inch of the nail. Most times we don’t splint toes if they are broken, but Wyorp Rock may have other suggestions. I would try to limit the activity and prevent her from jumping up and down from a roost. You can accomplish that in a wire dog crate with food/water for a few days.