The Amish and Mennonites here have slow moving triangles on their wagons.
I have yet to see one out in the heat taking 100 mile trips. Might be just a local thing, but they are very considerate to their horses. Yes, they are transportation and farm machinery but they care about them. Thinking about sending my big guy to go work for a living for a couple months, it would be good for him!
Spent a whole hour today laying in a pasture, waiting for a sparkling vampire to show up. Alas, I woke up and looked over, only to find a mound of horse crap. Sigh.