I don't know if it's for fitness testing or for finding cows, but they do do it. One year, we watched a herd of about 16 cows race over a ridge and off to one side of us. They were followed by a 4x4. We had to scratch our heads about how he got all those cows and concluded that he stole them when the herd bull was off fighting or something. Anyway, they were really covering the ground at that fast trot they have. We ran into them again 1/2 hr later. However, the little bull had just been reduced to satellite bull status by a nice 6x6. He was less than pleased about losing his harem.
