I just had a silkie of mine do the same thing ...I changed her food from layer to grower and gave her vit-al in her water everyday....it took about 3 weeks but this morning she greated me by standing up and running around the yard with the others....I think it was a vitamin deficiency...I did treat her for cocci also over the last 5 days....the others have never shown any signs of this either....Try the vitamin therapy first with electolytes and keep her cool.....Just saying your symtoms are the same as mine were..but not saying this will help!