Background: Both conditions are manifestations of an immune system over-reactive to allergens. The allergens may include dusts, molds, pollens or even food, and may vary from seasonal to year-round, often progressing in duration and severity as the horse ages. Dusty barns and moldy hay are important trigger factors. These conditions may develop following a viral infection.
Symptoms: Restricted air exchange within the lungs and resultant dyspnea. Include coughing, heaving, wheezing and increased respiratory congestion and secretion.
Diagnostics: Physical exam, lung function tests.
Special Notes: Performance horses are greatly impaired by this condition and may lose their ability to work.
Principles for Supplementation: Regulate immune system and relieve respiratory symptoms.