It actually looks like it could be the hip area or the lower joint...Not really too clear in the pic... But still such a little cutie. Splinting may help- but since the leg and foot are turning inward you would have to try splinting it so it doesnt turn in...very difficult. It could be a...
I have always had a thing for special needs waterfowl since raising my first Gosling at 12 years old - It had a dislocated leg. What a wonderful thing you have done for Crooked.
A few question though... How old is the duck?
Does it have any swelling in the joint ?
Does it seem to have...