That little one in the next to last picture with the feathered legs is a Silkie, not a Cochin. Cochins have yellow legs and skin, Silkies are black. That little chicky should also have 5 toes on each foot and a crest (and could be bearded or not). Yours looks like a partridge. I have no idea what the others are...besides stinkin' adorable. It looks like the first chick has green legs, maybe its a bantam EE? Good luck with your cute peepers!