Canine Struvite Dissolution


These smooth to slightly rough, relatively large radiopaque stones are often round to angular and usually associated with a Staphylococcus or Proteus urinary tract infection.

General Information

Medical dissolution is most effective for bladder and kidney stones. Urethral stones, especially those causing urethral obstruction are usually removed by other minimally invasive strategies or retrohydropropulsed back into the urinary bladder and removed surgically.


Urine culture and urinalysis.


Penicillins (e.g. amoxicillin) are usually effective against infection. Administer antibiotics throughout most, if not the entire dissolution time (i.e. 2 to 3 months). Consider medication to reduce urinary pain, if needed.


Feed struvite dissolution foods (e.g. Hills c/d multicare, others). Canned struvite dissolution foods may shorten dissolution time compared to dry foods.


X-ray every 5 to 6 weeks. Reduced urolith size/density/number indicates effective therapy, and accurate mineral prediction, and the need to continue dissolution. No change or increased urolith size/density/number is an indication to verify compliance (urine culture, urinalysis) or consider other urolith removal strategies.


We advise reviewing manufacturer's literature regarding selected therapeutic foods to determine indications and contraindications. For pets with multiple health concerns,we suggest that the selection of diet should take into consideration all health needs of the pet.

Link to Full Recommendation PDF

Canine Struvite Dissolution