Skipped Beats, Sudden Death… and Why We Shouldn’t Worry Too Much. When you first start examining patients as a veterinary student, you’re very keen to (gently) poke and prod every animal you come across. Realizing you can assess cardiovascular function by palpating peripheral pulses is very empowering!

Respiratory disease is one of the most important health concerns facing the horse industry, and accounts for one of the biggest reasons why horses miss training days (Rossdale et al., 1985). Equine asthma, also known as “heaves,” is one of the more troublesome small airway diseases which causes an elevated respiratory rate, chronic coughing and runny nose, and affected horses often find it difficult to exhale.

The equine respiratory tract is responsible for many different functions and is, on a basic level, quite similar to the human respiratory tract. One of its primary functions is the exchange of oxygen between the lungs and the red blood cells, which allows oxygen to be delivered to tissues throughout the body and becomes especially important during exercise when the oxygen consumption of the tissues increases. Another important function is the clearance of irritants such as dust, ammonia, and bacteria, from the respiratory tract. This is done by filtering large dust particles in the nose, coughing, sneezing, and trapping irritants in the airway mucus. However, excess nasal discharge, coughing, sneezing, and mucus secretion are all signs that a horse may be suffering from respiratory problems.

Horses are commonly housed in individual boxes. While this may be convenient and prevent injuries from other horses, it may also be detrimental to the horse’s welfare, especially if access to pasture is limited. A paper by Alice Ruet and colleagues investigated the effect of various management practices on the display of behavioural indicators of compromised welfare in housed horses.