We just had 11 baby ducks hatch 2 days ago and the last one to hatch has not been able to walk at all. His one leg is locked close to his body and wont extend while the other crosses over the first leg to help him scoot around!! Is this a niacin deficiency or is there something else going on? Also if it is a niacin deficiency can I give the boosters needed to all the babies or will it cause them harm?