Do they already both drive? I haven't done it yet, but a friend of mine has several miniature horse teams. I know they get each critter driving well first, and then put them together. I will call her and tell her to go on this site! They drive teams hooked to a wagon, and also chariots, where they run real fast! Yee Haw!!! I have a donkey driving gelding now (8 years old) and I am going to start my new Jack this year. I don't know if I will hitch him up this year. Might just get him used to the harness and ground driving, then actaully hitch next year. He has his studly duties and I don't want to throw too much at him. I do think teams are so neat! I love the harnesses with the metal dots on them.! How old are the two you want to use? Much luck and have fun!!!!!Wendy