# Bladder Stones in Dogs: Treatment, Diet and Surgery Bladder stones in dogs treatment depends on the stone type, the dog's sex, and whether the urethra is blocked. Struvite stones often dissolve with a prescription diet and antibiotics, while calcium oxalate stones usually need surgery. Your veterinarian will confirm the stone type before choosing a plan. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Struvite stones, the most common type in female dogs, often dissolve with antibiotics plus a therapeutic diet, with no other food or treats allowed [1][2]. - Calcium oxalate stones do not dissolve and typically require surgical removal or another procedure [3]. - Medical dissolution is not an option if the urethra is blocked or if your dog has conditions like pancreatitis or hyperlipidemia that make prescription diets unsafe [2]. - Expect several weeks of strict diet feeding and repeat imaging to confirm the stones are gone [4]. - Prevention centers on treating urinary tract infections, controlling urine pH through diet, and providing constant access to fresh water [1]. ## What Are Bladder Stones in Dogs? Bladder stones, also called uroliths, are rock-like formations of minerals that build up in the bladder or urethra [1]. They can be as small as grains of sand or as large as pebbles, and a dog may have one stone or many. Struvite and calcium oxalate are the two main types in dogs [5]. In one five-year study of 80 dogs with bladder stones, calcium oxalate made up 65 percent of cases, struvite accounted for 30 percent, and mixed stones made up the remaining 5 percent [3]. Struvite stones are especially common in females and often form because of a urinary tract infection [1]. Stones cause trouble in two ways. They irritate the bladder lining, which leads to pain and bleeding. They can also physically block the urethra, and a complete blockage is a life-threatening emergency. ## Signs Owners Notice The signs of bladder stones look a lot like a urinary tract infection, and many dogs have both at the same time [1]. Watch for: - Frequent urination, often in small amounts - Blood in the urine - Straining or crying while urinating - Accidents in the house in a previously reliable dog - Licking at the genital area - Abdominal pain or a tense belly Dogs with urolithiasis in one clinical study showed abdominal pain, painful urination, blood in the urine, and urinary retention [6]. If your dog is straining and nothing comes out, that is a blockage until proven otherwise. Call an emergency clinic right away. ## Causes and Risk Factors Struvite stones form when a urinary tract infection with urease-producing bacteria makes the urine more alkaline and concentrated [1]. In that environment, minerals become supersaturated and crystallize. As crystals clump together, they form a stone, and bacteria can get trapped inside the layers as it grows [1]. Calcium oxalate stones form for different reasons, tied to urine chemistry and genetics. Breed predispositions suggest that genes and metabolism play a role in who develops stones [7]. Newer research points to the immune system as part of the picture. Neutrophils release web-like structures called neutrophil extracellular traps, and these structures have been found inside canine urinary stones and the tissue around them. Common urinary pathogens trigger this response, and the traps promoted crystal clumping and stone growth in lab experiments [5]. Some dogs have higher risk because of an underlying condition. In a study of dogs with primary portal vein hypoplasia, a liver blood flow disorder, 28.5 percent had urolithiasis, and all of those dogs had crystals in their urine [8]. Age matters too. One large case review found that dogs between 2 and 5 years old had the most confirmed cases [9]. ## How Bladder Stones Are Diagnosed Your veterinarian starts with a physical exam. Large stones can sometimes be felt by palpating the abdomen [1]. Imaging confirms the diagnosis and shows where the stones sit. X-rays and ultrasound are the standard tools, and your veterinarian will choose based on your dog's situation. You can read more about how these tests work in [Radiographic and Ultrasonographic Diagnosis of Urolithiasis in Dogs and Cats](/knowledge/veterinary-medicine/diagnostic-imaging/radiographic-ultrasonographic-diagnosis-urolithiasis-dogs-cats). Urine testing is just as important. Your veterinarian will check urine pH, look for crystals, and run a culture to identify infection [1]. Blood work screens for conditions that affect treatment choices, such as pancreatitis or hyperlipidemia, which rule out some prescription diets [2]. If a stone is removed, it should be analyzed. Knowing the exact mineral composition guides treatment and prevention, which is why reference libraries for stone analysis exist [7]. A stone that is not analyzed is a missed opportunity. ## Bladder Stones in Dogs Treatment: Comparing Your Options There are three main paths. The right one depends on stone type, location, and your dog's overall health. ### Medical Dissolution Infection-induced struvite stones can often be dissolved without surgery. The protocol is an antibiotic plus a struvite dissolution diet, with no other food, including treats, and constant access to fresh water [2]. The antibiotic treats the infection while the diet changes urine chemistry so the stone slowly breaks down. A recent study followed 13 dogs with suspected struvite stones that were fed a therapeutic multipurpose urinary diet along with antibiotics given at the same time or recently completed. Complete dissolution occurred in 9 of the dogs, 8 with bladder stones and 1 with a kidney stone [4]. This approach takes weeks, not days. Kidney stones dissolve more slowly than bladder stones [2]. Your veterinarian will recheck with imaging to confirm the stones are truly gone. Medical dissolution will not work in every case. It is not appropriate if the urethra is blocked, or if your dog has a condition like pancreatitis or hyperlipidemia that makes the diet unsafe. Owner noncompliance or a dog who will not eat the diet also makes dissolution impossible [2]. In those situations, surgery or another removal method is needed [2]. ### Surgery and Other Removal Methods Surgery is the standard option for calcium oxalate stones, which do not dissolve. It is also used for struvite stones when dissolution is not possible or not advisable [2]. During a cystotomy, the veterinarian opens the bladder, removes the stones, and flushes the area. Stones are then sent for analysis. Lithotripsy, which breaks stones into smaller pieces, is another removal method for cases where dissolution is not an option [2]. Surgery has real advantages. It removes the problem immediately, which matters when a dog is uncomfortable or at risk of obstruction. It also gives you a stone to analyze. The trade-offs are anesthesia risk, a recovery period, and cost. ### Prescription Diets Prescription urinary diets do two jobs. Some are built to dissolve struvite stones, and some are formulated for long-term feeding to discourage stones from coming back [2]. A multipurpose urinary diet can be used for dissolution while also being designed to prevent calcium oxalate stones [4]. Diet only works if it is the only food. That means no table scraps, no chew treats, no flavored medications if avoidable, and no sharing with other pets. One extra treat can undo weeks of progress. For dogs with calcium oxalate stones, diet is a prevention tool after removal, not a dissolution tool. You can read more in [Calcium Oxalate Stones in Dogs: Surgical Removal and Prevention Diet](/knowledge/veterinary-medicine/internal-medicine/calcium-oxalate-stones-in-dogs-surgical-removal-and-prevention-diet). ### Cost Comparison Costs vary widely by region, clinic, and case complexity. The table below shows realistic ranges for planning, not quotes. | Treatment | Typical U.S. cost range | What drives the cost | |---|---|---| | Medical dissolution | $300 to $1,200 | Recheck visits, repeat imaging, urine cultures, several months of prescription diet | | Surgery (cystotomy) | $1,500 to $4,000 | Anesthesia, hospitalization, stone analysis, emergency vs. scheduled | | Lithotripsy | $2,500 to $6,000 | Specialized equipment, referral hospital, number of stones | | Emergency unblocking | $1,000 to $3,000+ | After-hours care, catheterization, hospitalization, intensive monitoring | | Prescription diet (ongoing) | $80 to $150 per month | Brand, bag size, dog's size | Ask your clinic for a written estimate before treatment. Many clinics offer payment plans or accept pet insurance, and insurance usually covers the surgical or emergency portion if the policy was active before symptoms started. ## Recovery, Outlook, and Long-Term Management After surgery, most dogs go home within a day or two. Expect restricted activity, a cone if your dog licks the incision, and a recheck to confirm healing. Urination may be bloody for a few days. Call your veterinarian if bleeding worsens or your dog stops urinating. After dissolution, the work is not over. Sterile struvite stones, meaning those not caused by infection, are more likely to come back than infection-induced stones because the underlying cause is not fully understood and persists after the stones are gone [2]. Some prescription diets are made for long-term feeding to reduce recurrence, though data on how well they work is limited [2]. Whatever path you choose, plan on periodic urine checks. Catching crystals or a new infection early is far easier than treating another stone. ## Bladder Stones in Dogs Prevention Prevention is realistic, and it starts today. - **Treat infections promptly.** Struvite stones are tied to urinary tract infections, so recurring UTIs need real investigation, not just repeated antibiotic courses [1]. - **Keep water available at all times.** Dilute urine makes it harder for minerals to concentrate and crystallize [1][2]. - **Feed the right diet long term.** If your dog formed struvite stones, your veterinarian may recommend a prescription diet to reduce recurrence [1][2]. - **Skip the extra treats.** If your dog is on a dissolution or prevention diet, everything else undermines it [2]. - **Keep recheck appointments.** Imaging and urine tests confirm the stones are gone and stay gone. - **Know your dog's risk.** Breed, age, sex, and underlying conditions like liver disorders all play a role [8][7]. If your dog has had stones once, ask your veterinarian for a written prevention plan with specific recheck intervals. ## Limitations and When to Contact a Veterinarian This article covers general principles. Your dog's stone type, sex, size, and other health conditions change everything, so individual cases need a veterinarian who has examined your dog. **Call an emergency clinic now if your dog:** - Strains to urinate and produces nothing or only drops - Cries out while trying to urinate - Has a hard, painful belly - Collapses, vomits repeatedly, or seems depressed along with urinary signs A complete urethral blockage can be fatal within a day or two. Do not wait for morning. **Call your veterinarian the same day if your dog:** - Has blood in the urine - Urinates far more often than usual - Starts having accidents indoors - Seems painful when you touch the belly **Schedule a routine visit if your dog:** - Has a history of stones and is due for a recheck - Has had repeated urinary tract infections - Is on a prescription urinary diet and you are considering a change ## Frequently Asked Questions ### Can bladder stones in dogs go away on their own? No. Struvite stones can dissolve with the right antibiotic and prescription diet, but that is active treatment, not a natural process [1][2]. Calcium oxalate stones do not dissolve at all and need removal [3]. Waiting rarely helps and often lets the problem grow. ### How long does it take for a prescription diet to dissolve bladder stones? It usually takes several weeks to a few months, and kidney stones dissolve more slowly than bladder stones [2]. Your veterinarian will recheck with imaging instead of assuming the stones are gone. If the stones are not shrinking on schedule, the plan needs to change. ### Is surgery always necessary for bladder stones? No. Surgery is the standard choice for calcium oxalate stones and for struvite stones when dissolution is not possible or not safe [2]. Many infection-related struvite stones dissolve with antibiotics and diet alone [1][4]. Your veterinarian will base the decision on stone type, location, and your dog's health. ### Can my dog eat treats while on a dissolution diet? No. During medical dissolution, no other food, including treats, should be fed [2]. Even small amounts can shift urine chemistry enough to stall the process. Ask your veterinarian which treats, if any, are acceptable before you give anything. ### What happens if a bladder stone blocks my dog's urethra? This is a medical emergency. A blocked dog cannot pass urine, and the bladder can rupture or kidney damage can develop quickly. Go to an emergency clinic immediately. Unblocking is done with catheterization or surgery, and dissolution diets are not an option in this situation [2]. If your dog has urinary signs and you are not sure what you are seeing, [Why Is My Dog having bloody urine? Cystitis Bladder Stones and UTI Guide](/knowledge/veterinary-medicine/symptom-guides/why-is-my-dog-having-bloody-urine-cystitis-bladder-stones-and-uti-guide) walks through the differences. For a deeper look at how veterinarians manage stones without surgery, see [Canine Urolithiasis: Medical Dissolution and Prevention](/knowledge/veterinary-medicine/clinical-internal-medicine/canine-urolithiasis-medical-dissolution-prevention) and [Canine Urolithiasis: Diagnosis and Medical Management](/knowledge/veterinary-medicine/clinical-methods/canine-urolithiasis-diagnosis-medical-management). ## Related Articles - [Canine Urolithiasis: Diagnosis and Medical Management](/knowledge/veterinary-medicine/clinical-methods/canine-urolithiasis-diagnosis-medical-management) - [Calcium Oxalate Stones in Dogs: Surgical Removal and Prevention Diet](/knowledge/veterinary-medicine/internal-medicine/calcium-oxalate-stones-in-dogs-surgical-removal-and-prevention-diet) - [Canine Urolithiasis: Medical Dissolution and Prevention](/knowledge/veterinary-medicine/clinical-internal-medicine/canine-urolithiasis-medical-dissolution-prevention) - [Why Is My Dog having bloody urine? Cystitis Bladder Stones and UTI Guide](/knowledge/veterinary-medicine/symptom-guides/why-is-my-dog-having-bloody-urine-cystitis-bladder-stones-and-uti-guide) - [Radiographic and Ultrasonographic Diagnosis of Urolithiasis in Dogs and Cats](/knowledge/veterinary-medicine/diagnostic-imaging/radiographic-ultrasonographic-diagnosis-urolithiasis-dogs-cats) - [Dog Kidney Disease Diet](/knowledge/veterinary-medicine/nutrition/dog-kidney-disease-diet) ## References 1. [Struvite bladder stones in dogs](https://www.vet.cornell.edu/departments-centers-and-institutes/riney-canine-health-center/canine-health-topics/struvite-bladder-stones-dogs). Cornell University College of Veterinary Medicine. 2. [Urolithiasis in Dogs - Urinary System](https://www.merckvetmanual.com/urinary-system/urolithiasis-in-small-animals/urolithiasis-in-dogs). Merck Veterinary Manual. 3. [A 5-year retrospective epidemiological and compositional study of canine and feline uroliths in Tehran, Iran (2019 - 2024)](https://pubmed.ncbi.nlm.nih.gov/42626433/). Veterinary research forum : an international quarterly journal, 2026. 4. [Outcomes of medical dissolution for suspected struvite uroliths in dogs using a therapeutic multipurpose urinary diet and antimicrobial therapy](https://pubmed.ncbi.nlm.nih.gov/41742526/). Journal of veterinary internal medicine, 2026. 5. [Neutrophil Extracellular Traps Promote Urolithiasis Formation in Dogs: A Preliminary Study](https://pubmed.ncbi.nlm.nih.gov/41897919/). Animals : an open access journal from MDPI, 2026. 6. [Comprehensive diagnostic evaluation of urolithiasis and cystitis in K9 dogs in Iraq: Clinical, laboratory, and imaging correlates](https://pubmed.ncbi.nlm.nih.gov/41630760/). Open veterinary journal, 2025. 7. [Protocol for establishing an infrared spectral reference library for canine urolith analysis](https://pubmed.ncbi.nlm.nih.gov/42154599/). STAR protocols, 2026. 8. [Urolithiasis and crystalluria in dogs with primary portal vein hypoplasia: a retrospective study (2010-2023)](https://pubmed.ncbi.nlm.nih.gov/42420192/). The Journal of small animal practice, 2026. 9. [Retrospective study of 353 confirmed cases of urolithiasis in dogs and cats treated at veterinary clinics in the northern region of Pará, Brazil](https://pubmed.ncbi.nlm.nih.gov/40104003/). Brazilian journal of veterinary medicine, 2025. ## Further Reading - [Merck Veterinary Manual: Dog Owners](https://www.merckvetmanual.com/dog-owners) - [Cornell Richard P. Riney Canine Health Center: Canine Health Information](https://www.vet.cornell.edu/departments-centers-and-institutes/riney-canine-health-center/canine-health-information) - [American Veterinary Medical Association: Pet Care](https://www.avma.org/resources-tools/pet-owners/petcare)