Urolithiasis (Urinary Stones)

This is a condition where crystals in the urine combine to form stones, also called Calculi or Uroliths. These can be found anywhere in the urinary tract, but most often in the bladder or urethra, where they cause irritation and secondary infection.

While any breed can develop Uroliths, a genetic predisposition to producing crystals makes the development of stones more likely. Several different types have been identified, with struvite stones being the most common, except in the Dalmatian.

Dalmatians have a defect in the pathway that normally leads to the breakdown of urates, resulting in increased urate excretion in the urine (4 to 8 times that of other breeds), and this predisposes them to the formation of urate crystals and eventually, stones.

Additional Information:

• Canine Inherited Disorders Database — Urolithiasis
• Information on Urinary Stones & Treatment

Note: This section of the Canada’s Guide to Dogs website is intended as a source of information only. It is not intended as a substitute for professional care. Always consult with your Veterinarian about health related matters.