Hello,
Sorry to hear about your dragon having a terrible impaction.
Only time will show what is going to happen. There have been dragons who full regained the use of their hind legs again while others who suffered extensive nerve damage simply did not. What was he impacted with?
One thing that you can with him is get him in a daily
bath deep enough for him to swim & try to get him to move his legs for exercise. That will help to encourage him to start moving them more.
Sometimes after an injury, even if they are recovered they will simply choose not to use their legs again. There really is no explanation for this other than maybe they are afraid to because they equate movement with pain perhaps. Try the water therapy & see how far you can get him to progress for you.
Is he eating?
Tracie