Dorsal Displacement of the Soft Palate (DDSP)

The soft palate is normally located below the epiglottis, but in some horses, it can move upwards (dorsally) over the larynx during exercise, causing a partial obstruction of the upper airways. This reduces airflow to the lungs and leads to abnormal respiratory noise and loss of performance.

Signs:

• Sudden loud gurgling, snoring or choking noises during work
• Reduced performance, especially at high speed
• Sometimes abrupt slowing down or stopping under saddle

Causes:
The exact cause is not always clear. Factors may include soft palate anatomy, tongue position, throat inflammation, or fatigue. It is most commonly seen in young sport and racehorses.

Diagnosis and treatment:

Depending on the cause, various treatments are possible.
Diagnosis is usually made via dynamic endoscopy, as the problem often doesn’t show at rest.
Treatment may include training techniques, special tack or bits, and in some cases a minor surgical procedure (Tie Forward).

Prognosis:
With proper management and treatment, the prognosis is generally good if no other airway problems are present.