Urospermia defined as the presence of urine in the ejaculate modifies the seminal environment and generates abnormalities in sperm motility, morphology and mortality as well as alterations in pH, BUN and creatinine of the ejaculate causing fertility problems for stallions. This pathology is caused by many factors that may involve nerve alterations, inflammatory conditions or intoxications and its treatment is based on the evolution of each patient with pharmacological and management alternatives. The objective of this report is to document the reproductive clinical findings, to discuss the treatment established and the possible causes in a case of urospermia of a Colombian stallion of 7 years whose motive of consultation was a yellow coloration in the ejaculate.