Im unsure of how old she is...again, she's not my duck

.. but i can try and find our from her owners next door. They're being fed a 17% layer crumble and have plenty of hay and grass to graze in. I also spoul my goose and her with a pot of veggies when i can, they especially enjoy peas and carrots, clementine, grapes and cucumbers and lettuce/ leafy greens. I'll look into the. Italian b complex. Unfortunately I don't know if it will help .. as her leg isnhealed. But it is permanently deformed and twisted. It doesn't seem to cause her pain, but I can 9magine it causes her a lot of stress. This video was also taken maybe 30 mins after I took her out of their kiddie pool. Her feathers seemed a lot more wet than they should be... they're also very thin.. I don't know.. im scared she's unhappy and sick or something. She enjoys being with my goose though, she will follow him around everywhere he goes. He goes to sit under their heat lamp... she gets up and waddles over as well. He runs outside to go swim, she will sit by the poolside and drill in the mud as he hogs the pool LOL. (Don't worry I make sure they both get ample time to swim)