We live in a rural neighborhood, and rarely lock our birds up. Well, since we added a rooster, we usually lock them up so he doesn't roam and crow at 5 am. Well we have 9 day old chicks that hatched naturally and last night I did not lock the coop up. This morning I am missing two chicks, momma feathers galore, and she looks a bit beat up around the head and neck. I don't see active bleeding, but her right eye is shut but not swollen. What can I put in her to make it better and avoid infection? I have some antibacterial cream, peroxide, but do I need to get any injection antibiotics?