Back home in Northern Michigan, it was always my job--with my collie dog, Dickie--, to go with the cows from the barn yard to the pasture. They really didn't need me--they knew where to go. I was probably 7 or 8 when I started that job. I also tried to ride the cows when they were in the barn. And that I wouldn't advise to anyone. Cows do not like to be ridden, and they wouldn't mind shaking you off and stomping on you.
My sister was even more adventurous than me. She not only rode the cows, she also rode the pigs!