I bought 2 ducklings from Rural King about a month and a half ago. My first question is this: My smaller one just died 2 days ago. I was wondering if I should get a duckling or an older one like my bigger duck is? I'm not sure which one would be best. My second question: both ducks seem to have a niacin deficiency from what I've read from other people in here. Before the little one died, her legs were at an X and my bigger ones legs are just slightly crossed. I've been giving them niacin in their water and Sav a chick electrolytes (switching off as not to overdose) for about 2 weeks now and it doesn't seem to be getting better. Is there anything else I can do? I am a first time duck owner, because my girlfriend wanted ducks, so I'm not sure where to go from here.