Have you had a necropsy to confirm Marek's in your flock already?I have been supplementing him with egg white powder (maybe 1/2 tsp total a day) to get him through this since he was moulting, weak and not eating at the time and I was afraid of mareks. In the past when I had hens with signs of mareks this increase in protein seemed to help and they did not become paralyzed. I am weaning him off this now that he's eating well.
Did I miss this some where?