Chick 1- either a Buff Rock or Buff Orpington
Chick 2- Could be a SLW Cochin but looks more like a Light Brahma or Columbian Cochin.
Chick 3- White Silkie
Chick 4- From another thread you posted on I said that:
She looks like a female Speckled Sussex, because of the white in her wing and her...