Cause of dorsal spinous process impingement in horses?

Dorsal spinous process impingement, often referred to as "kissing spines," occurs when the dorsal spinous processes of the thoracic vertebrae come into abnormal contact with each other. This condition can be caused by factors such as poor conformation, improper saddle fit, repetitive stress from certain riding disciplines, or underlying muscle imbalances. It may lead to pain, inflammation, and decreased performance in affected horses. Early detection and appropriate management are crucial to alleviate discomfort and improve the horse's quality of life.