Felt some real respect for these geese, observing that often one will just observe while others forage for grass. But in particular this one appeared to have one leg but still was the responsible one today. I did not observe any leg shifting but yes maybe maybe they just kept one leg to the side. Reading, https://enviroliteracy.org/can-geese-survive-with-one-leg/, here, I understand geese can survive this, learning to forage by hopping, and taking off to fly, by using wings for additional support. So I dont know if that was the case here, but maybe I'll see them again another time to confirm.