Judges - I haven't much experience but what little I had I will share in case it is applicable. I have "helped" a couple of silkies out when it got to the point that I thought they wouldn't make it otherwise. The wierd thing is - I have two (both were helped) that displayed that spraddlesque behavior. However I don't think they had spraddle. I think they have neurological problems. With the first we did the bandaid on the legs and she did get better and was able to walk correctly. However, she still has odd behavior. Does a lot of flailing when raising herself, and when walking, does a lot of circles - enough that I can tell she has some issues. The second doesn't do circles but flails a lot although she also is walking well. They both seem perfectly able of living a happy life.
I just wanted to share in case this is the case for yours.