Hello I have 3 ducklings, one is about 3 1/2 weeks old and acting fine and then 2 days ago it couldn't walk well and acted like it had little control over it's body. I heard about the niacin and he has been it for 2 days (in his water) he is still the same. After 1 day with no improvement I gave it to him in a dropper and I've done that twice. No change. Any suggestions? Thanks guys