A "Paranormal" Experience

This didn't happen to me personally but it happened to my dad. And isn't really a paranormal experience but my dad said this happened.

It was right after my papaw had died, like right when he had gotten the phone call that said it had happened. He was on the front porch of our trailer, we are surrounded on the east and south side of our house by a cattle pasture which is fully visible (say for a row of trees to the east) from the porch. It was pitch black outside of the range of our porch light say for the distant lights of our neighbors. My dad had just gotten off the phone with my mom when he heard the cows bellowing, but not just any bellow. He said it was the bellow that they made when my papaw would arrive in his truck which they could recognize by sound. He said he believes that it was papaw saying goodbye to his cows.