What is the most frequent cause of horse deaths?

It's difficult to pin down a single "most frequent" cause of horse deaths, as it varies depending on factors like age, breed, location, and even the definition of "death."

However, some of the most common factors contributing to horse deaths include:

* Colic: This refers to abdominal pain, and is a leading cause of death in horses. It can be caused by a variety of factors, including intestinal blockages, parasites, and inflammation.

* Old age: As with many animals, horses are more susceptible to disease and injury as they age.

* Injuries: Accidents, falls, and other injuries are common causes of death in horses, especially those involved in strenuous activities like racing or rodeo.

* Infectious diseases: These include diseases like Equine Encephalomyelitis (EEE), West Nile Virus, and Equine Infectious Anemia.

* Parasites: Parasites can lead to a variety of health problems, including colic, anemia, and weight loss.

* Nutrition: Inadequate or unbalanced nutrition can lead to health issues and ultimately death.

* Euthanasia: Many horses are euthanized due to illnesses, injuries, or old age.

It's important to note that these factors are not mutually exclusive. A horse may die from a combination of factors, and the exact cause of death may not always be known.

To get a more accurate picture of the specific causes of death in a particular region or population, it's best to consult with veterinary professionals or research studies focused on equine mortality.