I think the blue is a cochin/EE or Ameracauna mix due to the heavy leg feathering. The blacks' legs don't seem to be as heavily feathered, so could be Brahma mix instead. They're both big breeds, so if the roos are both full-size it may be difficult to determine. I'd start with how feathered the legs are.
The barnyard mix is interesting. I would have said EE, but sounds like she came from a brown egg. Do you know which breeds of your neighbors are the hens and which are the roosters, and what colors/varieties?
The barnyard mix is interesting. I would have said EE, but sounds like she came from a brown egg. Do you know which breeds of your neighbors are the hens and which are the roosters, and what colors/varieties?