You must have Patience! If you want you can tube feed him!
See this link!
https://www.backyardchickens.com/t/1023154/tube-feeding-videos-pictures-and-general-info
Good luck
Benny
Welcome to BYC
You need to continue to clean the wounds, and you also need to put some
Antibiotic ointment on the wound.
Keep him worm and give him food riche in protein like boiled and crushed egg, or some canned tuna fish. Give him some electrolyte in its drinking water, that will reduce...