The production of defective nephrocalcin may be a genetic problem. This substance is defective in both humans and dogs who form calcium oxalate bladder stones. There is a substance ( called “nephrocalcin”) in urine which naturally inhibits the formation of calcium oxalate stones. It should not be too surprising that there is a strong hereditary component to the formation of oxalate bladder stones. WHY WOULD MY DOG FORM CALCIUM OXALATE STONES? Calcium oxalate stones cannot be made to dissolve over time by changing to a special diet (as can be done with struvite or uric acid bladder stones). The only other ways to obtain sample stones are by surgically removing the stones from the bladder (the traditional method), retrieving them by sending a cystoscope up the urethra, or by using laparoscopy to send a mechanical arm through a small incision into the abdomen and then into the bladder to retrieve them. If the stones are very small, flushing the urinary bladder and forcefully expressing it may produce a stone sample for testing. HOW DO WE DETERMINE WHETHER MY DOG'S STONES ARE CALCIUM OXALATE STONES OR SOME OTHER KIND OF STONE?Īlthough a urinalysis can provide a clue, the only way to know for sure that a dog’s bladder stone is an oxalate stone is to retrieve a stone and have a laboratory analyze it. Most cases occur in dogs between ages 5 and 12 years of age.
Breeds at especially high risk include: miniature schnauzers, lhasa apsos, Yorkshire terriers, miniature poodles, shih tzus, and bichon frises.73% of Calcium Oxalate patients are male.
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