a 4 years old male guinea pig presented due to anorexia and "smelly urine".
The abdomen was very painful, especially in the area of the urinary bladder.
Also noted poor body condition
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Findings:
The stomach is filled with air. There are also some mildly distended bowel loops filled with air, probably due to ileus as a result of the anorexia.
The urinary bladder is distended.
There is a round mineral opacity caudo-ventral to the pelvis.
Diagnosis:
Urinary obstruction due to a urethral calculus.
Discussion:
Urethral calculi is a common problem in guinea pigs. The majority of the calculi are composed of calcium carbonate and the etiopathogenesis is not known. The urethra of guinea pigs can be 3-4 milimeters wide.
Their penis is s-shaped therfore urethral catheterization can be challenging.
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