Typically recommended doses of Yeast in animal feed depend upon the animal species : 
-       Poultry : 1 – 2 % as anti-stress factor during medication treatments
-       Swine : 2 – 5 % for piglets or 100-150 grams per day at the end of gestation and during suckling
-       Ruminants :  0.5 - 2 % for milking cows and fattening of bulls ;  0.5 – 3 % for young calves
-       Horses : 1 – 5 % or 100 g/day
-       Fur animals (minks, foxes, etc) : 0.5 - 5.0 %
-       Pets (dogs, cats) : 1 - 5 %
-       Pigeons and fowls : 1 – 4 %
-       Aquaculture : (salmon, trout, eel, shrimp, prawn, etc.) : 1 – 5 % (2 – 8 % in fry stage).
 
For specific applications (tablets, dainties) the percentage can be much higher (up to 100% for tablets).