I recently became a duck owner after buying 5 mystery ducks from TSC. Now they are around 7 weeks old and I have no clue how to identify breeds as they are so similar. Furthermore the only one that is for sure female by voice is the light colored with a bib, the others are raspy or barley quacking yet only a few have sex feathers. I have included photos of them at different stages if anyone can help. Thank you in advance!