We have plenty of chickens, but I do want to get more swedish flower chickens tho, because our rooster of that breed has something neurological going on, he couldn't hold his head up. But he's better about being upright now, but he stumbles/falls a lot. Thought it was botulism, thought maybe Mareks, but he was able to stand/walk, not sitting funny and no one else is doing it. He's been in our garage for almost a month now, and is "better" but still has trouble.
This year I want to replace the ducks and possibly the goose that had been taken... We'll see about the goose, but most definitely the ducks. Debating on if I want to hatch them again or just buy ducklings instead. Not feeling the hatching bug this year like I did last year that is for sure.
Some time Marek's can present with neck, wing or leg paralysis. Also coccidiosis can cause paralysis also as well as Vitamin B deficiencies might want to try trading for those. Just throwing out a few possibilities. Hope he gets better soon.