I had to euthanatize the filly. Unfortunately, the store clerk and the filly's owner represent a large group of people who don't fully understand the diseases that threaten their horses or the best strategies for preventing them. With so many options available, your vaccination schedule could become confusing. Not all diseases are a threat to all horses. Each horse's case is different.
Environmental diseases are threats from the horse's surroundings and wild animals.
More common in cows and dogs. These and other diseases threaten all horses depending on the incidence in their particular geographical location. To be safe, vaccination against the diseases listed above should be considered for all horses. Contagious diseases are spread from one horse to another. Individual or herds of horses that are kept completely isolated may not have to be vaccinated against contagious diseases, because there is no threat of exposure.