I have three buff ducklings. I don't know how old they are because a lady gave them to me. She said she got them from tractor supply. I don't have any pictures of them. They have feathers on their chest and tail. They're all still peeping with the occasional quack. They all look the same except their bills. Two of them have a brownish colored bill and one has an orange bill. Can you sex them by their bills? When do ducks start getting their sex feathers? Also, I have 2 pekin hens and they are 5 months old and still haven't layed any eggs. When should ducks start laying? Thanks!