Most of the urine just dribbles out. Both ureters are markedly dilated. The termination of the ureters is not easily observed on this radiograph but the mega ureters, breed, age and history are diagnostic for bilateral ureteral ectopia. See the takehome key for more information. including an explanation of why a dog with bilateral ectopia can still void urine. The free hemoglobin which is filtered can be toxic to the kidneys.
Casts are indicative of tubular injury.
The free hemoglobin in the urine stains the cast. RAM is a five year old spayed female Mastiff. She stays outdoors during the summer but lives indoors in the winter. The owners just moved Ram indoors last week and have noticed her bedding to be wet most mornings. You find no abnormalities on physical examination, biochemical profile and voided urinalysis.