I just wanted to say, that a couple of my young chicks have recovered from what I was CERTAIN would be life ending injuries...
one GLW recovered at 5 weeks old from having her neck ripped completely open from the top... I could see clear down into her neck, veins, muscle & bones.  I put her in a clean cage with vitamin water and food, and she recovered all on her own.  No goop, no meds... just clean stress free space.
repeat for a couple other injuries and presto.. haven't lost one yet.  I am surprised by how resilient they are really.
so... if you think there is a chance... GIVE them a chance... they might surprise you.