Urinary Tract / Kidney Stones (Calcium Phosphate) in Dogs

Urolithiasis is the medical term that refers to formation of stones in urinary tract. Among various types of stones, are stones that are made up of calcium phosphate.  Also known as apatite uroliths, calcium phosphate stones are more often found the kidneys than the urinary bladder.

In urolithiasis, symptoms depend on size, shape and location of the stones. Some dogs with the disorder may go without any outwardly visible symptoms.  

Typical symptoms associated with calcium phosphate urolithiasis are


Increased urination (polyuria)

Difficulty urinating (e.g., dribbling of urine)

Pain when urinating

Blood in urine

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