Urinary disorders are seen infrequently in horses. Frequently a common sign of colic is appearing to strain to urinate, so careful palpation and urinalysis may be needed to differentiate the cause of the strain.

Stones are predominantly a male problem. Clinical signs most often seen with them are, blood in the urine, straining with little or no urine production, and urine scalding of the back legs. With kidney stones the predominant sign was chronic weight loss rather than altered urination. 75 % of the urinary stones occurred in the bladder or urethra while 25% were located in the kidney or ureter (the tube that leads from the kidney to the bladder).