You love your horse, so you no doubt want him to live a long and healthy life. To ensure this, you should become familiar with some of the common ailments that can affect horses. In addition, establish a relationship with a local equine vet as soon as you obtain your horse. Follow her advice on deworming and vaccinations—these will depend on your location because different diseases and parasites are more common in some areas than others. Lastly, observe your horse closely and learn what normal behavior is for him. Abnormal behavior may be your first clue that something is wrong. The sooner you detect a problem, the sooner you can take steps to fix it.