Quatie
Free Ranging
The one time I have seen it, it was a nutrient deficiency. I would recommend seperating him so you can monitor his food and water intake. Usually with muscle weakness in the neck, I would take this as a sign they are not eating enough and need tube feeding. If you notice light green poop, this is likely the case. He may have a hard time getting food if the others choose to keep him away from it. Here is link how to test if he is underweight http://www.poultrydvm.com/topics/poultry-body-condition-score-chartsNoticed him as of yesterday, somethings weird with his neck. He hasn’t been extending it like the other ducks, and I even saw him laying with it on the ground (like almost as a dog would straight in front of him). When he walks it stays rested on his back. Never seen any other ducks do this. Any ideas?
With his leg issue, it could also be related to that. The b vitamins are one thing that should help with it, but he may also need vitamin E. I don't. Have a lot of experience with this. @Miss Lydia what are your thoughts.
If you have the option, an avian near you could tell better what is wrong.