When we went to the coop, one of the hens was shivering on her perch. A lot of her feathers were torn off and there was a bloody hole (about 1.5in. diameter) on her back beside her tail. The blood was black and had dried already when we found her, and a few other parts of her body were scratched and bleeding. What can we do to help her? We have a large dog cage we could put her in for some privacy, and the only antibiotic we have right now is Neosprin. Should we buy some supplies from Tractor Supply?