Many of my friends and I have only one horse, and they are all boarded alone. Does being alone affect a horse’s mental or behavioral health?

This is a question about the nature of the horse. For over two million years horses have developed as herd animals. While, in truth, they do not often run in the large thundering herds as seen in movies, they usually travel in bands of 2 to 8 horses. When possible, it is best to try and keep them in small groups with one other “buddy” or a few other horses that they like. While many horses do very well alone, they may develop behavioral vices or medical conditions as a result of solitude. Sometimes the addition of an animal such as a goat or donkey can also take the place of another horse.