I have been feeding my 3 year old geldings rice bran, pasture, fescue and a little alfalfa on occasion. We have one 2 year old who I seperate and feed two scoops of rice bran and extra alfalfa at night. He will be my future stud. I realize now I am feeding him too much rice bran... I am now adding a scoop of beet pulp instead of feeding him two scoops of rice bran. I just wonder if feeding him rice bran too much for the 1st and 2nd year of his life damaged his bone density and can I make it up now?