Thought I'd update everyone on the sad ending to my two birds.
I put down the silkie due to respiratory distress to find a necropsy that revealed a spot of focal pneumonia on her left lung and everything else within normal limits.
My silkie mix that has been skin and bones finally developed respiratory distress yesterday evening and so I made the appointment for euthanasia this am.
By the time I got her there, she was very cyanotic and in bad shape.
He necropsied her for me to find she threw a clot in her atrial chamber of her heart which made her go into CHF- congestive heart failure and he thinks this could be secondary to a genetic defect of the heart valve which caused the CHF to begin with.
She therefore had poor circulation and caused her to be sickly and not thriving. He also mentioned that her joints showed she was older than I thought but I told him that I raised her from 2 weeks old and she was in fact 9 months old.
It is difficult to determine why both birds presented with similar symptoms of the leg weakness and paralysis but he said its possible they could have been suffering from two different diseases.
I did mention that both birds came from the same bird woman and that it might be possible that they shared the same silkie roo father or mother and that maybe he/she passed the poor genes onto his offspring. The doc concurred that it is possible.
He also reported that it was highly unlikely that this was an infectious disease so my other birds should probably be ok. However, I will always be on alert due to the fact that I have one other bird that is a silkie mix related to the one I lost and it will always be possible that she could have inherited the same genetic defects.
So, sad ending.
BUT, I have closure in knowing that it wasn't related to my animal husbandry. I will most likely get two more birds to add to my flock eventually as I only have 8 left, come Spring.
Thanks to all that followed my story and appreciate the support.