My ducklings are 3 weeks old and have got their second growth of fluff. They have the beginnings of tail feathers in a little fan shape. What I wanted to ask was, on all 4 ducklings, there is a "nodule" of feathers growing in a little group out of a single pore just above the tail, which on some of them is a different colour to the rest of the feathers, but anyway, I wondered if this is the start of the male curly tail, or do both sexes grow it in this way? 2 of my babies are also making a funny peep - like their voice is breaking, and sometimes it comes out an octave lower! I am assuming these are girls?? Any advice appreciated.