About five months ago, our 5-month-old Croad Langshan rooster developed a case of what appeared to be wryneck. He had the classic neck twist/starry-eyed gaze and seems to be favoring one side of his body so that when he walked he leaned into one side more than the other. We brought him inside and added Vitamin B and Poultry Cell to his water. Within three days, he was fine. About a month ago, he seemed to be experiencing it again. I brought him inside again and got him started on Vitamin B and Poultry Cell. He seemed a little better, but after 5 days inside, he still had the "stargazing" appearance. We thought maybe the stress of being away from his flock was slowing his recover, so we set up a dog crate in the coop and had him in there, letting him out on warm days to forage with the flock. We continued to treat him with Vitamin B and Poultry Cell, then added a Nutridrench to his regime about 2.5 weeks ago. This week, we switched to Selenium and Vitamin E, with just the Nutridrech added to his water. While his neck has still been twisted, he appeared to be getting around okay, foraging with his ladies, and even attempting to mate. This evening, we went outside lock the coop and all the other birds had gone to roost but he was laying outside not moving. I thought for sure he was dead. Well, he's not, but he's clearly weak and in a full-blown head-twist. At most, he's gotten maybe 20% better from the first day we started treatment a month ago, but even that improvement has been an ebb and flow. No other birds in the flock are showing any symptoms, and I contacted his original breeder thinking it might be genetic, but she said none of the birds from his line have gotten wryneck. He's still eating and drinking and able to walk. But I don't know what else I can do for him. What other treatment options are there? What else could this be if not wryneck? Has anyone treated for this long and ended up with a positive outcome, or does it always end in culling once it's gone on this long? Is this breed particularly prone to wryneck?