# Dog Not Peeing After Surgery: How Long Is Too Long? Most dogs urinate within 12 to 24 hours after surgery, and many pee sooner once the anesthesia wears off. If your dog has not peed within 24 hours, or is straining with nothing coming out, that is a problem that needs a veterinarian right away. This guide explains what is normal for a dog not peeing after surgery and when to worry. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - A dog who had routine surgery (including a neuter) usually pees within 12 to 24 hours. Some dogs go 6 to 8 hours after waking up. - A full bladder plus no urine coming out is an emergency. This is called urinary retention or obstruction, and it can damage the kidneys. - If your dog is straining, crying, pacing, or has a hard, swollen belly, call an emergency clinic now. - Never push fluids or give human diuretics to force urination. Let your veterinarian decide the plan. - If it has been more than 24 hours with no pee, treat it as urgent even if your dog seems comfortable. ## What "Not Peeing" Actually Looks Like Owners use this phrase for two different problems. The first is a dog who simply has not gone yet. The second is a dog who is trying hard and producing little or nothing. These are not the same thing, and they carry very different risks. Watch your dog in the yard or on a leash. A normal pee is a steady stream with a relaxed posture. A dog with retention may squat for a long time, dribble a few drops, or produce nothing at all. Some dogs pace, whine, or lick at their belly. You can also check the bladder area. A bladder that is full and blocked feels like a firm, round balloon low in the belly. Do not squeeze it. Pressing on a blocked bladder can cause it to rupture. ### Normal Timeline After Anesthesia Anesthesia slows the whole body, including the muscles that control urination. Many dogs hold their urine during surgery and for a few hours afterward. Once they are awake, alert, and drinking, most will pee within 12 to 24 hours. Surgery type matters. A routine spay or neuter is usually quick, and these dogs often pee the same day. Longer procedures, orthopedic surgery, or surgery near the bladder and urethra can delay things a bit more. Pain, stress, and unfamiliar surroundings also play a role. The amount of fluid your dog received during surgery matters too. Dogs on IV fluids make more urine, so they often need to go sooner. Dogs who had little fluid may take longer. ### Is It Normal for Dogs to Not Pee After Surgery? A short delay is common and often harmless. A delay past 24 hours is not. The line between "waiting" and "emergency" is mostly about time and effort. If your dog is calm, comfortable, and it has been under 24 hours, you can usually watch and wait. If your dog is straining, uncomfortable, or past that window, call your vet. ## Main Causes of a Dog Not Urinating After Surgery Several things can stop urine from flowing. Some are mild and pass on their own. Others are true emergencies. The table below breaks down the most common causes. | Cause | Typical clues | How urgent | |---|---|---| | Anesthesia and sedation | Dog is still groggy, no straining, bladder not very full | Watch for 12 to 24 hours | | Pain or stress | Restless, tense, reluctant to squat, recent surgery | Call your vet the same day | | Postoperative urinary retention | Full bladder, little or no urine, dribbling | Urgent, same day | | Urethral obstruction (stone, plug, tumor) | Straining, crying, small or no stream, hard belly | Emergency now | | Dehydration or low fluid intake | Dry gums, tired, not drinking, small bladder | Call your vet the same day | | Kidney problems | Increased drinking and urination before surgery, now low output | Urgent, same day | ### Anesthesia and Sedation Anesthesia relaxes the bladder muscle and can blunt the urge to urinate. This is the most common and most harmless reason for a short delay. As the drugs wear off, the urge returns. Most dogs resolve this on their own within a day. ### Postoperative Urinary Retention Postoperative urinary retention (POUR) means the dog cannot void even though the bladder is full [1]. The review notes that the incidence varies widely, between 5% and 70%, depending on the patient and the type of surgery and anesthesia [1]. Risk factors include the surgery type, other health conditions, and the anesthetic drugs used [1]. The standard treatment is bladder catheterization, which a veterinarian performs to drain the bladder and relieve pressure [1]. ### Urethral Obstruction An obstruction is a physical or functional block to urine flow. Obstructive uropathy means urine cannot leave the body even though the kidneys may still be working [2]. Common signs include straining to urinate, lethargy, and vomiting [2]. Diagnosis is based on finding a distended bladder on examination or a swollen kidney on advanced imaging, along with blood work showing postrenal azotemia [2]. This is a life-threatening problem and needs care right away. Stones, blood clots, and tumors can all block the urethra. One case report described a dog with multifactorial lower urinary tract obstruction from suspected cancer and severe bladder stones [3]. The dog was treated with a urethral stent, and urine flow returned quickly, with improved kidney values within 3 days [3]. This shows how fast things can turn around when the blockage is relieved. ### Dehydration and Kidney Problems If your dog is not drinking enough after surgery, urine output drops. This is often easy to fix with fluids and time. Kidney disease is a different story. Chronic kidney disease can damage the kidney slowly over months or years, and it becomes more common starting at age 5 to 6, affecting up to 10% of elderly dogs [4]. Dogs with kidney disease may drink and pee more than usual, then swing to low output when they get dehydrated. ## Red Flags That Mean Emergency Call an emergency clinic right now if you see any of these: - Straining to urinate with little or no urine coming out - A hard, swollen, or painful belly - Crying, whining, or pacing while trying to pee - Vomiting, drooling, or collapse - No urine for more than 24 hours - Blood in the urine or a sudden stop in a dog who was peeing fine A blocked dog can decline fast. Toxins build up in the blood, and the kidneys can be injured. Do not wait to see if it passes. If your dog is straining to pee and nothing comes out, this guide on [Dog Straining to Pee: Emergency or Urgent?](/knowledge/veterinary-medicine/online-vet-and-care-costs/dog-straining-to-pee-emergency) explains why speed matters. ## Safe Things You Can Do at Home While Waiting You cannot force a dog to pee, but you can make it easier and safer to wait. - Offer water. Do not restrict it unless your vet tells you to. - Take your dog out often, every 1 to 2 hours, on a leash in a quiet spot. - Keep the area calm. Stress can tighten the bladder muscles. - Watch for a stream. Note the time, the amount, and whether your dog strained. - Check the incision. A swollen, red, or draining incision needs a vet visit. - Keep a simple log. Write down times, water intake, and any pee or poop. Do not give human medications for urination. Do not press on the belly. Do not use a catheter at home. These can cause serious harm. If your dog is also not pooping, that is a separate issue. This article on [Dog Constipation After Surgery: Causes and Safe Relief](/knowledge/veterinary-medicine/digestive-and-urinary-care/dog-constipation-after-surgery) covers that side of recovery. And if you are wondering how long a dog can normally hold urine, see [How Long Can Dogs Hold Their Pee](/knowledge/veterinary-medicine/symptom-guides/how-long-can-dogs-hold-their-pee). ## What Your Veterinarian Will Check Your vet will start with a physical exam. They will feel the bladder to see if it is full, small, or painful. They will check your dog's hydration, gum color, and heart rate. Next comes testing. A urine sample can show infection, crystals, or blood. Blood work checks kidney values, electrolytes, and signs of dehydration. Imaging, such as X-rays or ultrasound, can find stones, tumors, or a swollen kidney [2]. If the bladder is full and your dog cannot void, the vet will place a urinary catheter to drain it [1]. This relieves pressure and buys time. In some cases, they may flush the urethra to clear a plug or stone. If there is a tumor or a fixed blockage, a stent may be an option, as in the case described above [3]. Your vet will also review the anesthetic drugs used. Some drugs affect bladder function more than others, and that can guide the plan [1]. ## Prevention and Monitoring After Surgery You cannot prevent every case, but you can lower the risk and catch problems early. - Follow discharge instructions exactly. Give pain meds as directed. - Encourage drinking. Offer water often, and ask your vet about wet food if your dog is picky. - Take your dog out on a schedule. Go every 2 to 3 hours for the first day. - Watch the first pee closely. Note the time and the stream. - Keep the incision clean and dry. Check it twice a day. - Call your vet with any change. Early calls are cheap. Late calls are not. If your dog had a neuter, the same rules apply. A dog not urinating after a neuter is usually just a short delay, but the 24 hour rule still holds. If your dog is coughing or gagging after surgery, that is another sign to report. See [Why Is My Dog Coughing And Gagging After Surgery](/knowledge/veterinary-medicine/symptom-guides/why-is-my-dog-coughing-and-gagging-after-surgery). ## Limitations and When to Contact a Veterinarian This article gives general guidance. Your dog's case is specific. Only a veterinarian who examines your dog can tell you what is safe. Call your veterinarian the same day if: - It has been 12 to 24 hours with no pee - Your dog is uncomfortable but still passing some urine - Your dog is not drinking - The incision looks swollen or has discharge Go to an emergency clinic now if: - Your dog is straining with no urine - The belly is hard or painful - Your dog is vomiting, weak, or collapsed - There is no urine for more than 24 hours Do not wait for a morning appointment if your dog is in distress. Urinary obstruction can cause lasting kidney damage and can be fatal. ## Frequently Asked Questions ### How long can a dog go without peeing after surgery? Most dogs pee within 12 to 24 hours after surgery. A delay past 24 hours is a red flag. If your dog is straining or uncomfortable, do not wait for that mark. ### Is it normal for a dog to not pee after a neuter? A short delay is common after a neuter because of anesthesia. Most dogs pee the same day. If your dog has not peed within 24 hours, or is straining, call your vet. ### What if my dog is straining but only dribbling? Straining with little output suggests a partial or full blockage. This needs urgent care. A full bladder that cannot empty can damage the kidneys. ### Can I wait until morning to call the vet? Only if your dog is comfortable, has peed some, and it has been under 24 hours. If your dog is straining, vomiting, or has a hard belly, go now. ### Will my dog pee on his own after anesthesia? Most do, once the drugs wear off and your dog is drinking. If the bladder stays full and nothing comes out, a veterinarian may need to place a catheter to drain it [1]. ## Related Articles - [Dog Constipation: How Long Is Too Long Without Pooping?](/knowledge/veterinary-medicine/digestive-and-urinary-care/dog-constipation-how-long) - [Dog Constipation After Surgery: Causes and Safe Relief](/knowledge/veterinary-medicine/digestive-and-urinary-care/dog-constipation-after-surgery) - [How Long Can Dogs Hold Their Pee](/knowledge/veterinary-medicine/symptom-guides/how-long-can-dogs-hold-their-pee) - [Why Is My Dog Coughing And Gagging After Surgery](/knowledge/veterinary-medicine/symptom-guides/why-is-my-dog-coughing-and-gagging-after-surgery) - [Dog Straining to Pee: Emergency or Urgent?](/knowledge/veterinary-medicine/online-vet-and-care-costs/dog-straining-to-pee-emergency) - [Dog Urinating More Often: When to See a Vet and When to Wait](/knowledge/veterinary-medicine/vet-visit-decisions/dog-urinating-more-often) ## References 1. [Postoperative urinary retention (POUR): A narrative review](https://pubmed.ncbi.nlm.nih.gov/38654881/). Saudi journal of anaesthesia, 2024. 2. [Obstructive Uropathy in Dogs and Cats - Urinary System](https://www.merckvetmanual.com/urinary-system/noninfectious-diseases-of-the-urinary-system-in-small-animals/obstructive-uropathy-in-dogs-and-cats). Merck Veterinary Manual. 3. [Case Report of Urethral Stenting in a Dog with Multifactorial Lower Urinary Tract Obstruction Associated with Suspected Transitional Cell Carcinoma and Severe Cystolithiasis](https://pubmed.ncbi.nlm.nih.gov/42188942/). Veterinary sciences, 2026. 4. [Noninfectious Diseases of the Urinary System in Dogs - Dog Owners](https://www.merckvetmanual.com/dog-owners/kidney-and-urinary-tract-disorders-of-dogs/noninfectious-diseases-of-the-urinary-system-in-dogs). Merck Veterinary Manual. ## Further Reading - [The Urinary System of Dogs - Dog Owners (Merck Veterinary Manual)](https://www.merckvetmanual.com/dog-owners/kidney-and-urinary-tract-disorders-of-dogs/the-urinary-system-of-dogs) - [American Veterinary Medical Association: First Aid Tips for Pet Owners](https://www.avma.org/resources-tools/pet-owners/emergencycare/first-aid-tips-pet-owners) - [Merck Veterinary Manual: Dog Owners](https://www.merckvetmanual.com/dog-owners)