protein and its effect on birth weight....myth?

[Dale]

In the 60's we let a mineral salesman talk us into feeding mineral with protein to cows on good pasture in the summer.  That fall we had calving problems from the same herd bull and same cows that had no dystocia in previous years; we quit the protein and had no calving problems the following year.  Our education is valuable--we paid dearly for it.