I have 6 female ducks that are going into their third winter. One of them has been having balance issues and uses her wings to help steady herself. She eats and drinks normally and follows the rest out into the yard. He poo seems the same as the rest. She does not move around as much as the others would hang out in a patch of apple mint over the summer. She would swim and preen when I put her in the pool. She does not seem distressed but has definite balance issues. Today I noticed that when she was spreading her wings for balance that the joint by her back seemed discolored, darker but I could not get her wings to spread out to inspect more closely. Not sure if this is from dirt and debris or some kind of fungal issue. She tends to hold her slightly wings away from her body more often now too, just holding them open as well as using them to stay on balance. She also falls forward. We just got our first dusting of snow so their movement will become more limited but I am worried about her. There are no vet options for ducks in our area. Not sure what to try first. Any thoughts or ideas appreciated.