My first reaction was the Dalmatians as well. I have 2 Goldens and they tend to chase the horses, same with my Lab Poodle cross. I recently adopted a couple Dals and they are great. They require a lot of exercise so running along by the horses is great for them and they have the endurance to do it.
Many people have sighed for the 'good old days' and regretted the 'passing of the horse,' but today, when only those who like horses own them, it is a far better time for horses. ~C.W. Anderson