We've been raising chickens for awhile and decided that we would get 3 ducks as well. Everything was going well until we noticed one of the ducks was having trouble walking. She had large hocks and swollen legs in general. She was walking bowlegged and pigeon toed too, so we decided she probably had a niacin deficiency. That was two days ago and her hocks and entire legs have gone down, but she's still having trouble walking. She's about a month old, did we notice too late that she was having issues? And how long would it take for her to get better generally? (This is the duck.)