My ducklings are 12/13 days old today and Egg 1 and 2, as I'm still calling them, have just started making a noise similar to the whoopie cushion sounds in this video:
I thought it was one of my dog's toys at first, then I thought maybe one of them had a cold etc, because I could hear that sound coming from the box I'm keeping them in, during the night on day 11. But I had them all sitting on my bed in a bunch today, and Egg 1 and 2, when I played this video, started making the same noise I heard in the night back when they heard the noise in the video. Then I filmed them as I do every day, and uploaded it and played it back to see if it had uploaded correctly, and when they heard the noise in the video, they started repeating the noise back to themselves in the video.
The noise they make isn't exactly the same, it's a shorter version of it, but it's the beginnings of it, and not a noise I've heard them make before. Egg 3 is still making only the peeping sound.
Egg 3 is slightly bigger than the other two, despite being born a day later, and has a larger pink beak now, which has got progressively pinker, after starting out darker, whereas the others have smaller black beaks, (I'm not sure if this is a factor) but I'm hoping 1 and 2 are girls and 3 is a boy.
I guess only time will tell, but it's exciting watching these tiny changes and waiting to find out.