Tub time in lukewarm water is about the best I have been able to do to get the duck to rest their legs.
Have you tried a tiny bit of T-Relief ointment on the leg?
We were soaking his foot in Epsom salts and he wouldn't relax till he'd been in for maybe 15 min. He's too worried about getting out to his buddies.
Where would I find T-relief ointment? What is it?