Need help identify duck breed?

[Hollymac]

hello I’m hoping one of you can help us identify what kind of ducks these are. We saved one from a local duck pond (left on the sidewalk) and two my husband got from a local duck farm. Also can you tell if they are male or female yet or can you not tell until they are older? Thanks in advance!

 

[Quarterhorses1]

Not sure on breed but if I had to guess A is a boy and B is a boy. But you definitely need to wait a bit longer