Mystery CO-OP ducklings, any ideas

[RHF]

My parents got some ducklings from the CO-OP and they are all pretty dark colored but I'm not quite sure what several of them are, there are eight total and I'm pretty sure five of them are khaki Campbell but not sure about the other three.

I'll try and get some pictures of them tonight

 

[RHF]

Got some pictures not great quality but hopefully you guys can still help with identification, the third duckling is one I'm fairly certain is a khaki Campbell and the other four are identical to that one, but again no clue on the other three.