What to do for chicken?

Our polish chicken has gotten a significant amount of pecks to the head. Came back from being gone for a few days and noticed he had dilated pupils, balance issues, and falls asleep often. The first two photos are from Tuesday and the last photo is from today (Friday). We have had him separated from the flock so that his head can heal and have been giving him electrolytes and mash. Also have been applying Vaseline for healing. Seems like he might have some brain swelling from the pecks. His condition doesn’t seem to be improving or getting worse and he also doesn’t seem to be in pain, just some brain damage. Is there anything else we should be doing to help him recover? Maybe some Blue-Kote?