I thought I'd update this thread, especially since around Christmas a little miracle happened!
First of all, my boy (Pawlu is his name, a Maltese version of Paul
) continues to regain strength in his legs and control of them; if before even one wing was a bit droopy, then now he can stand (!) with both wings nicely collected as they should be, and he can STAND, and, more recently, instead of stumbling around chaotically flapping his wings, he can now nicely hop on one leg from one side of his large box to another. AND, this past month he TWICE somehow jumped out of the box in my absence and I found him on the floor near his roommate Indy's crate (who has a different problem). I just cannnot believe how far he has gone in his recovery. For most of the time he stands now, sometimes on one leg (ironically, the one which has a tumour/cyst? on the side, just above the hairless/scaly part), sometimes on both.
Now, since from the start there were these two tumours/cysts (?), I was worried as they were gradually turning into a very hard substance under the skin, sort of like a piece of dry wood. One on his chest and the other one, as mentioned, on his leg. They were/are not really attached to anything, just there under his skin.
Around Christmas I picked him up for the n'th time to examine him, and I noticed that one of the cysts is sort coming out through his skin - it looked like an old wound healing, with the cyst being rejected by the body and the skin closed and healed underneath it. I didn't help remove the cyst all at once, since there was no open wound or blood or anything, I just left it there to continue. I think during the day Pawlu also picks on it and maybe that has helped to get it out and off of his body. Practically the next day I found part of the cyst, hard as a rock, with feathers that were growing on the skin it was under, in his box. I examined him and the skin had healed and there was no sign of anything at all. There is still some part of it remaining, but I'm not going to interfere with the process. The one on his leg is still there, under his skin.
When I get back my regular camera which can take normal pics, I will take a pic of the cyst as it's on my desk now.
As for any treatment, I have been giving him vitamins in water (but not every day now) and also vitamin E in a ball of bread sometimes.
Here is a recent pic of my Pawlu.
He is a very talkative, intelligent boy, and he LOVES a nice massage - he stretches his neck on my knee and closes his eyes as I massage his back and legs.
Here he is with Chilly, one of our dogs: