How to prevent/ minimize diseases

• Vaccinate all of your horses. Only vaccinate your horse against that are well known in your area. the vaccinations should always be given when your horse is healthy and not stressed.
• Keep horses in a safe, healthy and stress free environment. If a horse is stressed them may become sick. Horses do not like loud noises, crowding, extreme temperature, not enough water, to much exercise, exhaustion, and other types of stress. 
• Do not let your horse drink from other water tanks other than their water tank. Such as if they are at fairgrounds or on a trail rides. Diseases can be spread from horses drinking other horses water.
• Keep feed and water supplies clean and uncontaminated.
• Minimize exposure with strange horse, because another horse may have a disease that you don't know about and they may give it to your horse.
• If you get another horse for the first two weeks keep it isolated from other horses, just to make sure the horse does not have any diseases. So put the new horse in a separate pen till you are sure the horse is healthy.
• If a horse becomes sick then you should separate the horse from your other horses. Especially if the horse has a contagious disease, so the infection does not spread.