Plot hole: Norman, the orphaned new-born calf, could not have survived more than a few days after birth unless he was adopted by a foster-mother cow. The cattle were not dairy cows, and it's obvious the "cowboys" are not providing milk or other sustenance for Norman. Even if he had lived, he would be extremely weak and emaciated and physically unable to run with the herd.
Suggested correction: We see that they are providing said food for Norman, and secondly, we never see if another cow does indeed do exactly that. After all, they can give milk, just not enough to sell, so Norman could indeed get fed.