I have a little duck (around 2 months old) that has a hard time walking/balancing. Her legs are not noticeably deformed. She does not have bumble foot.. She will walk really weird for a few steps and lay down. Her hatch mate did the same for a week, and is completely fine. Martha doesn't have all of her wing feathers yet.. Could that be why she can't balance properly? My fiance is starting to worry, and I'm not sure what to do.