Well my little duckling that suffered the traumatic episode at just a day or two. Amiga might recall but I don't know if I ever posted about it. I swear to Goodness, that little baby was dead in the palm of my hand. (It was just one of those crazy wild broody duck freak out moments while I was trying to force mom to take her babies in). Anyway, it was like it was gone, then it was breathing very slowly, but with a limp neck and no muscle tone in its body. So after that it finally stood up, but it was holding the little wings at a strange angle and panting. (There's the reason Holly had to go all short-story-long!) That panting and odd wing holding angle was indicative of the trauma. It just went away on its own by the following am and now the duckling is just fine.
... So, you posted 13hrs ago, did the panting stop?