RosemaryDuck
Crowing
So, I'm not at all sure about this for birds (as there's very little information regarding it and a few sites say to use with caution) but you could try Prednisone as a last ditch attempt if nothing else is helping. I've used it for smaller mammals with spinal injuries (some that couldn't walk due to bruising) and it works wonderfully. Again though, I have no idea about it's use with birds. Pred is also pretty tough on organs if given for to long and it has to be slowly tapered off. Just thought I'd throw the idea out there for you. I'd talk to a vet about other options if you can.