Miss Piggie, a Boston Terrier, meets Suzanne, a dairy cow, and asks to play chase. Dairy cows are large animals, weighing an average of 1,400 pounds and standing about six feet tall. They are usually curious about smaller animals like dogs, but they keep their distance. It's not surprising, given their size. Despite their size, dairy cows are gentle giants with good eyesight. So while they may not be scared of dogs, they prefer to stay away from animals smaller than them.