Just had to add that at a healthy jog, I used to walk over 10 miles during a day (and worked full time). I happen to live on a nice neck of a lake which offers hiking trails. I've wondered about the length that a healthy horse can make in one day if I could make a jog from my house, through this 10 mile trail, and back with time to fix supper for my daughter. Seems I could out walk a healthy horse during my better days?? BTW, after this healthy jog, I then made a healthly supper for my daughter, cleaned house, etc., and went to bed, only to get up the next day for another full days work, a sometime 10 mile jog, supper, etc. Surely these 18th century horses were in better shape than single mothers of the 20th century. Just a note. Linda Linda