Me neither. Weve got 2 Highlands but when our Ryelands arrive in a few weeks we wont be putting them together. Horses can be so unpredictable. I have enough vet bills.
On the other hand, I know several people who have one horse and they have a sheep to keep the horse company. I even know one person whose horse and ewe share a stable thu the whole winter: they love each other. So it can be done.