We also kept both horses and goats (as well as chickens and a pair of ostriches) near the cows and it never bothered them at all - they really were easy going girls. They were quite interested when 2 of our mares foaled next to them about 2 hours apart and we did have to move the cows as they kept sticking their heads through the rails and making the one maiden mare nervous. I think you will enjoy Jerseys. In fact, I recently purchased a Jersey girl for our TX property and the sheep & goats there don't bother her at all.
