Too much calcium in nutritional/brewers yeast for ducklings?

[Angelove]

I am currently supplementing my ducklings with Niacin with the BVS poultry pack that was sent with them from Metzer. I would like to begin mixing niacin into their food and was considering using human grade brewers yeast or nutritional yeast. All of these products list calcium in mg or percentages on their labels. I know that over doing calcium is not good for ducklings, is the amount of calcium in these products a problem for them?

 

[CluckerFamily]

I used nutritional yeast for my ducklings.
What breed do you have? The larger breeds need more niacin than others.

 

[Angelove]

Welsh Harlequins

 

[Miss Lydia]

Never had any problems using Nutritional yeast with my ducklings.

 

[Duckiiess]

I used 1 tbsp of nutritional yeast per cup of chick starter crumbles food for the ducklings, they're about 2 months old now and no issues. Moved to the purina duck pellets when they were about a month old, that has niacin already in it. Have also heard good things about the flock raiser crumbles, will likely start them on that next time.

 

[MrsTush]

I have 9 muscovies and I've been obsessed with their legs since I got them. I added nutritional yeast to their food and a sprinkle of niacin powder until they were about 3 months old. Those ducks have the straightest legs and feet I've ever seen. Lol
They are really healthy and active.
They are all on flock raiser crumbles.
Just for comparison - I got a 10 week old pair that were not given any of that and both were slightly pigeon toed. I wasn't able to correct it but it didn't get worse.