What to Expect When Your Dog Is Spayed
Deciding to have your dog spayed is one of the most common veterinary decisions pet owners make, yet many people hand their dog over at the clinic with very little idea of what actually happens during those few hours. Understanding the procedure can ease anxiety and help you prepare properly for your dog's recovery.
Before the Operation Begins
The process starts well before any incision is made. Your vet will ask you to withhold food from your dog for a set period before surgery, typically from midnight the night before. This prevents vomiting under anaesthesia, which can cause serious complications including aspiration pneumonia.
On the morning of the procedure, your dog will receive a pre-anaesthetic health check. The vet will listen to the heart and lungs, check mucous membranes, and assess overall condition. Blood tests are often recommended, particularly in older dogs, to confirm the kidneys and liver are functioning well enough to process the anaesthetic drugs safely.
A pre-medication injection is then given, usually combining a sedative and a painkiller. This calms the dog, reduces the amount of general anaesthetic needed, and means your dog is already receiving pain relief before the operation begins.
Induction and Anaesthesia
General anaesthesia is induced intravenously, most commonly using a drug such as propofol. Once your dog is unconscious, a tube is placed into the trachea to maintain the airway and deliver a mixture of oxygen and anaesthetic gas throughout the procedure. This is called endotracheal intubation, and it allows the anaesthetic team to control the depth of sedation precisely and respond quickly if anything changes.
Throughout surgery, a veterinary nurse or technician monitors vital signs continuously. Heart rate, blood pressure, oxygen saturation, respiratory rate, and temperature are all tracked. An intravenous drip is kept running to support blood pressure and provide quick access for any emergency medications.
The Surgical Procedure Itself
The surgeon shaves and sterilises the skin on your dog's abdomen. The spay, known medically as an ovariohysterectomy, involves the surgical removal of both ovaries and the uterus. In some countries, particularly parts of Europe, an ovariectomy — removing just the ovaries — is becoming more common, as evidence suggests it carries equivalent long-term outcomes with a slightly shorter operating time.
The surgeon makes an incision through the skin and then through the muscle wall of the abdomen. The length of the incision varies depending on the size and weight of the dog, but it is typically a few centimetres just below the belly button. The reproductive organs are located and carefully lifted out through the incision.
The blood vessels supplying the ovaries and uterus are ligated, meaning they are tied off or sealed using surgical ties or an energy device, before the tissue is cut away. This step is critical — precise, secure ligation prevents post-operative haemorrhage. Once the ovaries and uterus have been removed, the surgeon checks for any bleeding before closing.
Closing the Incision
The closure happens in layers. The muscle wall is sutured first, then the layer of tissue beneath the skin, and finally the skin itself. Some vets use absorbable sutures that dissolve over time; others place external sutures or skin staples that require removal at a follow-up appointment roughly ten days later. Many clinics now use surgical glue on the skin surface as an additional seal.
Recovery in the Clinic
After surgery, your dog is moved to a quiet, warm recovery area. Nurses monitor her closely as she wakes from anaesthesia. Body temperature tends to drop during surgery, so heating pads and warm blankets are used to keep her comfortable. Most dogs are groggy and a little disoriented for the first hour or two after waking, which is entirely normal.
Pain relief continues during this period through injections or long-acting medications. Your dog will not go home until she is fully conscious, able to stand, and the team is satisfied her vital signs are stable.
Going Home and What to Watch For
Most dogs are discharged on the same day, though some clinics prefer to keep younger puppies or dogs who had complications overnight. When you collect her, you will receive aftercare instructions, pain medication to give at home, and guidance on when to return for a check-up or suture removal.
For the first ten to fourteen days, rest is essential. The internal muscle layer takes significantly longer to heal than the skin, which means even if your dog appears comfortable and energetic, too much movement can cause complications. Use a lead for all toilet trips, avoid stairs if possible, and keep her from jumping on and off furniture.
Watch the incision daily for signs of infection: increasing redness, swelling, discharge, or an unpleasant smell. A small amount of bruising around the site is not unusual in the first few days. An Elizabethan collar, or recovery suit, should be used whenever you cannot supervise her to prevent licking, which introduces bacteria and can break down the wound.
Long-Term Benefits of Spaying
Beyond preventing unwanted pregnancies, spaying eliminates the risk of pyometra, a life-threatening uterine infection that is unfortunately common in unspayed middle-aged and older dogs. It also removes the risk of ovarian and uterine cancers and, when performed before the first season, significantly reduces the lifetime risk of mammary tumours. These are meaningful health benefits that extend well beyond population control.
The procedure itself is routine, but that does not mean it is trivial. Knowing what your dog experiences from pre-med to recovery helps you make informed decisions and support her properly in the days that follow.