I originally posted in the thread https://www.backyardchickens.com/forum/viewtopic.php?id=541184 At first we thought our 2 year old Partridge Chantecler rooster had CRD, and dosed him with Tylan 50, injected. He started off seeming off-balance and then stopped walking completely, though the muscles in his legs still worked. His symptoms got progressively worse, with his head twisting around him, flupping his wings at the same time, and being very listless after the 'episode'. I posted his symptoms in the above thread and learned it was likely Wry Neck. We got prednisone, selenium, Poly Vi Sol and Vit E for him, and also started giving him yogurt (as well as apple cider vinegar in his water, which he has always gotten). A few days later he stopped with the 'neck twisting' episodes but, after a brief one day period where he seemed to be getting more energetic (ie: fighting against us when we picked him up, really attacking his food), he has gotten progressively more lethargic over the past two days. We've also been giving him Pedialyte as it's been pretty warm here, and we thought maybe he was low on electrolytes. Last night we gave him 0.1cc of Ivermectin, injected, as we noticed he and the other birds have lice. Not sure about other parasites, but if there are some I'm sure they've not been helping his condition. He's not so much eating or drinking today without being prompted, and it looks like his wattles are starting to lighten a bit in color. His crop feels a bit larger and squishier than the other Chantecler rooster's. Is there a chance that he's got sour crop?