I have two Pekin ducklings that are 15 days old. A few days ago we started to notice that one of them seems to have trouble walking. She is sitting down at every chance she gets and sometimes she just scootches herself along instead of standing up and walking. Also, when we took them outside it was very obvious that she was walking differently than the other duckling. She seems to wobble back and forth a lot more and her legs are further apart when she walks. She is also a lot slower. Something else that I've noticed that she does it that her mouth always seems to be open (almost like she is panting...but it isn't hot). And she always makes this "cooing" noise, which sort of sounds like a very faint whistle. I'm sure these don't have anything to do with her walking, just thought I'd mention it. Any help would be great! Thanks!