I think Rowe is the best feed money can buy. As far as how you should feed it. The .49 should be fed exclusively if you are still trying to get the heifer into show condition. If the heifer is fat enough for show then you will want to start mixing in the Guts feed. The higher the energy, ".49 compared to .38", the more fat you will put on them and show condition. The guts is for adding volume to the gut by blowing up the stomachs with high fiber. Half and half may be too much Guts. It all depends on what your heifer needs. You could always just ask Gene and he will tell you.