Hello all- I have two 4 week old ducklings. The one is normal, the other is wobbly, drunk looking, occasionally falls on her back with legs up in the air, chest puffed out, head & neck barely controllable. She has been getting niacin & electrolytes for four days with no sign of improvement. She does, however, eat & drink without a hitch. Please, somebody offer some advice. I have searched the internet exhaustively & cannot find what the problem could be other than niacin deficiency.