How long should I add brewers yeast to ducklings feed?

[KCDC]

I have 14 khaki campbell ducklings that are 9 weeks old. How long is recommended to add brewers yeast to their feed? I apologize if this has been asked before but i couldn't find a thread that addressed this issue.

 

[Miss Lydia]

It's rec for at least 10 weeks many of us continue to use it weekly or more often it can't hurt them.

 

[KCDC]

It's rec for at least 10 weeks many of us continue to use it weekly or more often it can't hurt them.

Thank you Miss Lydia. I seemed to remember reading 10 weeks as the mark but couldn't find where i read it at.