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Haematuria is not an uncommon presenting sign in dogs. An attempt to localise the source of the bleeding should be made; local disease of the urogenital tract, systemic disease and bleeding disorders warrant consideration. This case report describes the investigation of haematuria in a 10‐year‐old male neutered (MN) Labrador. The clinical examination findings, diagnostic and treatment options, along with prognosis for transitional cell carcinoma as a cause of haematuria, are discussed.

A 6-year-old male entire Irish Terrier presented following 24 hours of stranguria, pollakiuria, haematuria and dysuria. Investigations performed to determine the underlying cause of the lower urinary tract signs included urinalysis, abdominal radiography and ultrasonography. Cystine crystals were identified on urine microscopy. Uroliths were identified on abdominal imaging and were considered to be the cause of the urethral obstruction and resultant dysuria. Analysis of retrieved stones confirmed the uroliths to be composed entirely of cystine. This article uses a case example to discuss cystinuria in the dog and briefly review the approach to diagnosis, treatment and management of dogs presenting with lower urinary tract signs.

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