Bringing your dog home after TPLO surgery can be stressful, especially if they seem reluctant or unable to urinate.
Many dogs are sleepy, uncomfortable, and hesitant to move after surgery, making it difficult for owners to know whether a delay in peeing is normal or a sign of a complication.
In many cases, a dog not peeing after TPLO surgery is experiencing the temporary effects of anesthesia, pain medication, or difficulty standing comfortably on the operated leg. However, urinary retention, dehydration, or other postoperative complications can also prevent normal urination and require immediate veterinary attention.
In this guide we explain the most common reasons for a dog not peeing after TPLO surgery. Knowing what to expect during recovery can help you support your dog and recognize when it’s time to call your veterinarian.
Dog Not Peeing After TPLO Surgery: Why It Happens
A dog may not pee after TPLO surgery because anesthesia, pain medications, reluctance to bear weight on the operated leg, stress, or dehydration temporarily interfere with normal urination.
Most dogs urinate within several hours after returning home, especially once they are fully awake and comfortable enough to stand.
However, repeated straining without producing urine, a swollen abdomen, or prolonged inability to urinate should always be evaluated by a veterinarian.
What Is Dog TPLO Surgery?
TPLO (Tibial Plateau Leveling Osteotomy) is a common orthopedic surgery used to treat a torn cranial cruciate ligament (CCL), which is similar to an ACL injury in humans.
During the procedure, a veterinary surgeon cuts and rotates the top of the shin bone (tibia) to change the angle of the knee joint, then secures it with a metal plate and screws.
This stabilizes the knee without relying on the damaged ligament, allowing the dog to bear weight more comfortably while the bone heals.
TPLO surgery is most often recommended for medium to large dogs or active dogs because it provides excellent long-term stability and helps reduce pain and the progression of arthritis.
How Long After TPLO Can a Dog Walk?
Most dogs begin placing some weight on the operated leg within 24 to 72 hours after TPLO surgery, although limping is expected during the early recovery period.
For the first 6 to 8 weeks, activity should be limited to short, controlled leash walks for bathroom breaks and gradual rehabilitation as directed by your veterinarian.
As the bone heals, walk duration and intensity are slowly increased based on follow-up examinations and X-rays.
Most dogs return to normal daily walks by 8 to 12 weeks, while full recovery, including a return to running and vigorous activity, typically takes 3 to 6 months, depending on the dog’s age, size, overall health, and rehabilitation progress.
Related: Dog not peeing (Causes and treatment)
Dog Not Peeing After TPLO Surgery: Symptoms
Some dogs simply delay urination after surgery, while others develop signs that suggest a more serious problem.
Common symptoms include:
No urination for several hours after returning home
Reluctance to squat or lift the leg
Frequent attempts to urinate without success
Straining to urinate
Whining or showing discomfort while trying to pee
Restlessness or pacing
Swollen or firm abdomen
Lethargy or poor appetite
Dog Not Peeing After TPLO Surgery: Common Causes
Lingering Effects of Anesthesia
General anesthesia commonly affects bladder function for several hours after surgery. Your dog may not fully recognize the urge to urinate until the medications have worn off.
Many dogs are sleepy, weak, and less interested in walking during this period. Once they become more alert, bladder function usually returns to normal.
Read more: Dog Not Drinking Water After Surgery (Why it happens)
Pain and Reluctance to Bear Weight
TPLO surgery involves the knee joint, making it uncomfortable for many dogs to stand, balance, or squat during the first day or two of recovery.
Some dogs want to urinate but avoid the movement because it places pressure on the operated leg. They may repeatedly go outside without actually peeing.
Appropriate pain control and gentle support while walking often help these dogs regain confidence.
Pain Medications
Opioid pain medications prescribed after TPLO surgery can temporarily slow bladder emptying by reducing bladder contractions or decreasing the urge to urinate.
Other side effects may include drowsiness, constipation, and reduced appetite. Never discontinue prescribed medications without consulting your veterinarian.
Stress and Unfamiliar Surroundings
Hospitalization, surgery, and changes in routine can temporarily affect a dog’s willingness to urinate.
Some dogs are reluctant to pee because they feel anxious, disoriented, or uncomfortable after returning home.
A quiet, familiar environment and calm bathroom breaks often help reduce this temporary hesitation.
Dehydration
Dogs typically fast before surgery and may drink less water afterward because they are sleepy or nauseated. Reduced fluid intake means less urine production.
Once your dog begins drinking normally again, urine output usually increases. Continue offering fresh water as directed by your veterinarian.
Urinary Retention
Urinary retention occurs when the bladder fills but cannot empty properly. This may result from medication effects, nerve dysfunction, or temporary disruption of normal bladder function after anesthesia.
Dogs often strain repeatedly, appear uncomfortable, and develop a firm, enlarged bladder. Prompt veterinary treatment is needed to prevent bladder damage.
Urinary Tract Obstruction
Although uncommon after TPLO surgery, urinary obstruction can occur independently of the orthopedic procedure.
Bladder stones, urethral blockage, blood clots, or severe inflammation may prevent urine from passing.
Affected dogs repeatedly attempt to urinate but produce little or no urine. Complete urinary obstruction is an emergency requiring immediate veterinary care.
Postoperative Complications
Less commonly, complications such as severe pain, internal bleeding, or adverse reactions to medications may indirectly affect urination.
Dogs experiencing postoperative complications often appear unusually weak, reluctant to move, or increasingly uncomfortable.
These situations require immediate reassessment by your veterinary team.
Read more: Dog Panting Excessively After Surgery (Here’s why)
Dog Not Peeing After TPLO Surgery: What to Do
Follow all discharge instructions provided by your veterinarian after TPLO surgery. Take your dog outside regularly on a short leash for calm, controlled bathroom breaks, even if they do not urinate immediately.
Use the support sling provided by your veterinary team, or place a towel under your dog’s abdomen if instructed. Supporting some of your dog’s weight can make standing and squatting much more comfortable during the first few days after surgery.
Offer fresh water once your dog is fully awake and cleared to drink. Monitor how much they drink, as adequate hydration supports normal urine production.
Keep a simple record of when your dog last urinated, how often they attempt to pee, and whether they appear to strain or show signs of discomfort. If possible, note whether any urine is produced and approximately how much.
Avoid forcing your dog to walk long distances or climb stairs simply to encourage urination. Excessive activity can interfere with TPLO recovery and increase discomfort.
Never attempt to manually squeeze your dog’s bladder or give human medications to stimulate urination. These actions can cause injury and may delay proper treatment.
When to Call or Visit the Vet
While a brief delay in urination can be expected after TPLO surgery, complete inability to urinate or repeated unsuccessful attempts should not be ignored.
Schedule an appointment if you notice:
Your dog has not urinated within the timeframe recommended by your veterinarian
Reluctance to bear weight that prevents urination
Mild straining to urinate
Reduced urine output despite drinking normally
Continued lethargy after anesthesia has worn off
Poor appetite lasting longer than expected
Increased licking around the urinary opening
Persistent discomfort when trying to urinate
Seek emergency veterinary attention immediately if your dog develops:
Repeated straining with no urine produced
A swollen, firm, or painful abdomen
Crying while attempting to urinate
Collapse or severe weakness
Vomiting along with inability to urinate
Pale gums
Blood from the urinary opening
Complete inability to urinate accompanied by obvious distress
Dog Not Peeing After TPLO Surgery: Treatment
A physical examination by the veterinarian includes assessment of hydration, evaluation of the surgical site, and gentle palpation of the bladder to determine whether it is enlarged or painful. If the bladder is overly full, your veterinarian may recommend immediate treatment to relieve urinary retention.
Diagnostic tests may include blood work, urinalysis, abdominal ultrasound, or X-rays if urinary obstruction or another complication is suspected.
Treatment depends on the underlying cause. Dogs experiencing temporary medication effects may simply require additional monitoring and supportive care. Pain management may be adjusted if discomfort is preventing normal urination.
If urinary retention develops, a urinary catheter may be placed to empty the bladder safely. Dogs with dehydration may receive intravenous or subcutaneous fluids. If a urinary blockage or another serious complication is identified, additional procedures or surgery may be necessary.
Recovery and Monitoring
Most dogs begin urinating normally within several hours after TPLO surgery as the effects of anesthesia wear off and they become more comfortable standing. Some senior dogs or dogs recovering from lengthy procedures may take a little longer.
Continue monitoring your dog’s water intake, urine output, appetite, activity level, and willingness to bear weight during recovery. Follow all instructions regarding restricted activity, leash walking, medications, and follow-up appointments.
Monitor the surgical incision daily for redness, swelling, discharge, or excessive licking, and notify your veterinarian if anything appears abnormal.
If your dog suddenly stops urinating again, develops straining, abdominal swelling, or signs of pain during recovery, contact your veterinarian immediately.
Key Takeaway
A dog not peeing after TPLO surgery is often experiencing temporary effects of anesthesia, pain medication, reluctance to bear weight, or mild dehydration. Most dogs regain normal bladder function once they are awake, comfortable, and able to stand more easily.
However, repeated attempts to urinate without producing urine, a swollen abdomen, severe pain, or prolonged inability to pee should never be ignored.
These signs may indicate urinary retention, obstruction, or another postoperative complication requiring prompt veterinary care.
By closely monitoring your dog’s recovery, providing appropriate support during bathroom breaks, and following your veterinarian’s postoperative instructions, you can help ensure a smooth recovery after TPLO surgery.
If you are ever unsure whether your dog’s lack of urination is normal, contact your veterinary team promptly for advice.