I get this beef feed at the co-op. "13% coarse" is what it's called. It has cotton seed hulls, cracked corn and a pellet of some sort. I expect the 500lb ers to like it but the baby calves love the stuff. Its cheap and everything wants to eat it. I keep the weaned babies away from it but they will walk away from the sweet calf starter to get it if there is any left in the bunk feeders. What is the appeal to cattle of cotton seed hulls.