Hi, I am no vet! And definitely not an expert in this, but this is what I found worked for me!
I bought some poly idol that I added to the water just so he was getting some extra as he was still able to drink at first...
Then I crushed together 2 vitamin e liquid tablets, 2 vitamin b tablets, and 1mg of prednisolone, and 2 selenium tablets with 1ml of nutri drops I ordered from the omlet shop online.
I then split this up into 2 doses which I had to drop feed him twice a day.
In between that I would hand feed scrambled egg, to try and boost him, and changed his feed.
I did this for 2 weeks....
Then on the third week I halved the doses and only gave it him once a day...
Then on the fourth week halved the dose again, and have it him every other day, this was to check he was definitely ok, and to make sure the prednisolone was reduced slowly.
Luckily he pulled through so far, but is a bit smaller and still has a kink in his neck.
But he is happy running around!
Good luck!