Horses are good in many ways. Road building is one of the most destructive and expensive parts of a working forest and tree farm. With horse you don't need as many roads. If you use them in the winter, where there's snow, they also eliminate any erosion and soil compaction. I will start a list of preferences. With regards to timber removal we will have skidder with big air tires over skidder with tracks, and horses (and other pulling animals). I once heard of a guy who used a hot air balloon to skid his logs. He put a block and tackle on the tops of 4 trees at 4 "corners" of the cut-block. He then used the balloon to move the logs to the deck where they were milled. No roads/skid trails.