Niacin for geese

[shailey]

I have a hurricane coming our way and plan to have the geese & ducks cooped for the duration of the storm. Since they won't have any access to grass/natural niacin I plan to supplement for their safety, the question is, will human grade niacin be okay for them? I bought a bottle of regular (500mg) niacin quite awhile ago and have had no use for it so I'm wondering if it'll be fine to give it to them. (all of them are full grown)

 

[BirdsBeesTrees]

Do you give them All Flock feed? It has niacin in it.