In a message dated 2/27/2006 1:12:17 AM Eastern Standard Time, pipacees@xxxxxxxxxxx writes: Also how much height difference is acceptable for a pair? It would seem that a major factor that height makes is length of stride. Leaders in a four are often smaller but it is important that the can move out with the larger wheel horses. What weight could you fairly expect a pair of 15 hh standardbreds to pull? In coaching with a four today, a horse will still pull his own weight plus. That has been true for 100s of years. And is there a difference in pulling power between pacers and trotters? Douglas Kemmerer Middleburg, VA