Cows Aligning

Who knew? It seems that cows have internal GPS. When grazing or resting they align themselves north and south. I thought they turned themselves into or against the wind, or some such system to maximize their tolerance of the conditions they find themselves in while pasturing as they await their fate as hamburger or steaks. As a child, I was fascinated with how at milking time, 6PM or so, our herd of milk cows would come in single file, down the hill from the pasture and arrive at the back door of the barn to be milked by my Dad. Every once in awhile he had to go out by the front porch and holler out, "Coooommme Booosss!!!! (Come to think of it, the only time I heard my Dad yell was at the cows.) In a few minutes at the top of the hill in the pasture would be the single file of cows heading toward the barn. There was a worn path from the pasture to the barn. The cows followed it faithfully every night. I guess their udders were full of milk made from a day of munching on sweet alfalfa in the meadow. They were anxious to let loose of their heaviness, return to the pasture, align themselves north and south and doze from their day's labor. (Eating all day can be exhausting.)
Post script: Maybe Dad would have lived more years, had he kept the cows around to yell at. He probably needed something to holler at. When there was no rain, when the best crop got hailed out 2 years in a row, when the combine broke down in the middle of harvest, when he lost his leg. He didn't get mad, he just made jokes and laughed. I wonder if some hollering would have saved his life for a while longer.