Hi Lori: When we were working with Peppy to get him accustomed to traffic when we were training him to drive. We took him on many relaxing walks along the road where we encountered traffic....and sometimes I brought Gusti or someone else along. Always just on a lead rope, no one was riding.
Long relaxing pleasant walks might help a barn sour horse settle in with his new neighbourhood and all the sights and sounds and smells that go with it. If your arms are tired from holding him back on the way home, would it be easier to manage from the ground? There's more than one way to skin a cat...(lordy...I hate that saying)... Sometimes we set our goals a little too lofty for the day, when the reality is...tons of good progress was made, and the next day you can build a little more positive progress onto that. Seriously, I wish I was there to help you relax and puzzle through this. I think you're doing wonderfully well with him as it is though.... Wanda