Dumor 20% Chick Grower/Starter for Ducklings niacin supplement

[holiday hawk]

I have ducklings coming later this week and would like some advice on how much brewers yeast to add to the Dumor Chick Grower/Starter. I was going to buy this brewers yeast. How much yeast should I add per cup of food to make sure they get enough? I'm getting one khaki campbell, one cayuga, and two golden layers, if the size of the ducks will make a big difference.

 

[picklestheduck]

I’m no expert but I thought it was one and a half teaspoons per cup. I’ll tag a few peeps who are more knowledgeable. @BelovedBirds @Miss Lydia

 

[Miss Lydia]

I don't see B3[niacin ] even mentioned look on the back of the bag.
I rec nutritional yeast and it's 1 tablespoon per each cup of feed you serve.