New here and would love some help. We got 5 new ducklings around 4 weeks ago at TSC. They are on Purina Duck Pellets and all eat well. We also give a niacin supplement 100mg non flush per gallon of water. We noticed one struggling a little more than the others recently and it appears it's hips are wider than the others. Is there something additional we should do to help the little one? We have separated it from the others to a calm space until we can figure out next steps. It typically stands with one foot further back than the other. Any help or guidance appreciated.