Horses need to get our of their stall or pen every week so they get their exercise that they need. Horses that are in a stall usually have more energy and get more exited than horses in a pasture or a bigger pen. This is because horses like to run, if they don't get out than they get out of shape just like humans. Horses also get bored just like humans too. For example, if you have a class that you do in the same steps or routine every day you ether get annoyed or bored it the same thing. Also, horses love and know what their jobs are but they need a vacation for a day of work so try something new or go on a trail ride for two three hours straight. This wont only make them happy it will build their muscle tone! If you and your horse haven't become a teem yet then try lunging him or her for a while to get them to focus on you. One other thing you could try is let your horses out in a pasture or round pen for a half an hour so they could just be horses and they can get their energy out before you ride them. If you don't have access to a turn out or round pen then go for lunging instead or if you don't think that you will be able to catch your horse in a pasture lunging is defiantly the way to go so they don't just run away from you.