Yes, for the Niacin.I have some yeast stuff left over from when they were ducklings/goslings. Do you mean for the niacin? Their food has it in. Can they get too much if I sprinkle some on and will it be ok for the geese? They all eat from the same food bowls.
Our chickens eat it too. It works in poultry like Vitamin C in humans: we can't overdose on it as our bodies use what they need and excrete the excess.

