Feeding gets complicated, and the differences between complete feeds, ration balancers, and targeted supplements matter. Bodyweight is not the only factor.
If you were using an online feed balancing calculator based only on hard feed and ignoring pasture, that would be like trying to balance your human diet by focusing super hard on the biscuit you had at morning tea, and ignoring everything else you ate in that day.
If we don’t know what’s in the largest part of the diet, we can’t perfectly balance minerals on paper. So instead of chasing perfect numbers, here at Sound Advice we teach owners something far more practical.