I don't know how helpful this will be, but here are a couple of threads to read about basic wound care or emergency care:
https://www.backyardchickens.com/a/wound-care-for-chickens
https://www.backyardchickens.com/t/...rgency-and-supportive-care-updated-10-30-2016
https://www.backyardchickens.com/a/wound-care-for-chickens
https://www.backyardchickens.com/t/...rgency-and-supportive-care-updated-10-30-2016