Neurologic issues can affect horses at any age, and clinical signs can result from infectious and non-infectious causes. Increased understanding of equine neurologic conditions has enabled earlier diagnosis and improved outcomes, and vaccines have reduced the spread of infectious diseases. However, diagnosis and treatment remain challenging in some cases.

Across Canada, owners, riders, farms, and horses continue to struggle with strangles, equine influenza, and equine herpesvirus myeloencephalopathy. Not only can these diseases be detrimental to horses’ health, but managing ill horses can stretch finances, shut down commercial operations, and be an emotional roller coaster for those involved.

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.

One of the most common conditions affecting soundness and performance lifespan of horses is osteoarthritis (OA), with some reports suggesting 60 percent of lameness issues in horses is attributable to OA(1). OA is known across animal and human populations to cause stiff and creaky joint movement. It can make getting up in the morning difficult or slow you down the day after a long run.