I am going crazy trying to figure out what I have... I KNOW I have 1 drake for sure, was actually able to vent sex him when he was a few days old. I thought the second khaki was a duck, looked like a female all 3 times I tried vent sexing her but these are the first ducks I've ever had so I am no expert vent-sexer. They are now about 12 weeks old and starting to get new feathers again and in the sun it's obvious that the drake has green head feathers coming in ... and so does the "duck". Hers aren't nearly as green. Now I was sure I had 2 ducks and 1 drake until now - I have a Welsh Harlequin DUCK too. The drake has always had visible curly drake feathers and the other two do not. The drake's bill has been yellowish green for about 3-4 weeks now and the other khaki's is just starting to lighten up in the middle over this last week, a very small amount so far. I can't tell by the quacks, the khaki's sound similar to me but all I have to compare to is the Welsh Harlequin, which is loud and we tease her that she is the goose of the flock. Anyway, I am very distraught, I do not want to get rid of any, I love them all. Won't the drakes fight? Overbreed the Harlequin? Can ducks be caponized?