I agree with the others on the Clarifly.  We have it custom mixed in our mineral for off site pasture cattle, and we mix a bag with 3000 gallons of CCDS ethanol syrup in a tank for the rest that get TMR fed daily.  Works really well.  I have noticed it takes a quite a bit longer to build up in the groups getting it in the mineral, so we start them earlier in the spring than the ones getting it in their feed ration.