What are the symptoms of shock
https://www.tillysnest.com/2013/12/shock-in-backyard-chickens-html/ If the OP heard loud quacking then came upon her duck it could have very well been a predator attack. We don't know for sure. but having activated charcoal on hand is always a very good idea.
https://www.tillysnest.com/2013/12/shock-in-backyard-chickens-html/ If the OP heard loud quacking then came upon her duck it could have very well been a predator attack. We don't know for sure. but having activated charcoal on hand is always a very good idea.