I have 5 gallon buckets side by side in my coop. Will a dog kennel work, then tomorrow while the other are out I can let her run around in cage?
Yes, a dog kennel should work well to keep her safe. I would definitely clean the wound as suggested by @Wyorp Rock -- cut back any feathers that touch the wound because they will just keep disturbing the healing process. The best thing possible is to keep the flock in touch so they can hear and see each other- then when it's healed and it's time for her to return it should be pretty simple.