Hi, I had a chicken that was attacked by a dog. I was totally freaked out by the punctures, I went ahead and washed them quite well with a mild, MILD, soap. Most soaps have harsh cleansers and foaming agents, even gentle baby ones. I use Dr.Bronner's castile soap.
Other than keeping them clean(washing twice a day) I made sure to keep her in a warm, dark, quite place(box with towels in warm closet)I fed her nutrient dense foods and left her alone.
Often normal wound care is too harsh and will hinder the healing process. Betadine, Bactine, Hydrogen Peroxide etc... All kill white blood cells which are needed for healing. An initial cleaning might be ok, but I would not use it daily.
If you would like to "soak" her, you could add non-iodized sea salt mixed at 1/4 teaspoon to 1 cup warm water. Anything stronger is too harsh.
I have used this basic aftercare with great results, she lived for many more years, with no ill affects. I had a chance
to try it out again when one of our roosters got out and was able to fight, through the fence, with another rooster. My husband thought he was dead, we did basic wound care and force fed him. He also lived for many more years.
A few things I would try now if I had another injured chicken, Gentian Violet(on wound) and Colloidal Silver(in water) and Cold Pressed Extra Virgin Coconut Oil on the surface in place of traditional ointments.
If you do go the anti-biotic route, also give probiotics daily.
Hoping your girl is on the mend, best wishes-Christine