One of my hens that survived a dog attack had a huge gaping bite wound. It wound up getting infected. The only thing I found on the net that seemed safe to use on the exposed tissues was unpasteurized honey. The wound started out a good one inch deep by one inch diameter. I pour honey into the wound twice a day and every two days I manually remove all the garbage material. It's been three weeks now, but guess what - it's working! It's now only a centimeter deep by less than a centimeter diameter! As for eating it off herself, she doesn't. She does, however, take bites off the spoon while I'm drizzling the honey into her hole.
As for an internal antibiotic to keep her from going septic, I've been spiking her breakfast with copious amounts of turmeric. Know what? She is not in the least bit sick and never showed any signs if internal infection/blood poisoning from day one!