Today I lost my beloved sebright rooster. He was the coolest guy (unlike his brother that met the dinner plate). He showed some neurologic signs a month ago, but appeared to make a full (almost) recovery. I dont think you could have recognized any symptoms if you hadnt known he was sick. I talked to the poultry vet at CSU and based on his age, was suspicious he may have leukosis, causing a tumor. I think I will send him in for necropsy, so I can survey what my flock carries. I am surprised how good he looked, yet still met his demise.