That's funny he says that, everything I've ever read says when a calf is with it's mother nothing will take the pressure off the cows milking ability. Milk always comes before creep feed, grass, or protien supplements when it comes to calf growth or taking the pressure off a cow.He said some thing to the effect of we don't raise calves on milk. Once you get past the first (forgot what time period he said) we raise calves on grass and supplement milk.
We looked into this because of the late year droughts we've been having. I thought if we had creep feed out the calves wouldn't go for the milk as much and the cows would look better. Not saying the guy is wrong or the calves won't gain more it's just a different take than I've heard.