Niacin for ducklings...how often?

[DawnB]

I know how much to put in the water, but are you supposed to give it all the time? If not how often within a week. Thanks!

 

[Miss Lydia]

I know how much to put in the water, but are you supposed to give it all the time? If not how often within a week. Thanks!

Everyday in their water till 10-12 weeks old,