Ready to Spay Your Labrador? Here's How to Time a Big Dog's Surgery

You may think it's as simple as picking up the phone and booking an appointment but deciding when to spay a large-breed female dog like a Labrador Retriever is more complicated than that. A lot more complicated according to Dr. Paola Cuevas, senior in-house veterinarian at Dogster. You see, the timing of a large breed's spaying impacts two different aspects of their health. Spaying her early lowers the chance of mammary tumors, while spaying later gives the skeleton more time to mature. That's why having a full understanding of both the risks and benefits, helps you to better advocate for your pet and make the right decisions when it comes to surgery.

Why growth plates matter for large breeds

Cuevas states that for female dogs, the biggest reason to slow down any type of surgery is about bone development. Estrogen, the hormone produced by the ovaries, helps growth plates close on schedule. These are the soft areas at the ends of her larger bones where growth and lengthening happens. When you remove the ovaries before the skeleton is finished, you prolong growth plate activity and can alter the proportions of the developing bones. And this matters most in large breeds where the skeletal structure matures considerably later than those of small dogs.

And research reportedly supports the caution with studies of Labrador Retrievers, Golden Retrievers, and German Shepherd Dogs, that were neutered in the first year of life experiencing joint disorders at two to four times the rate seen seen in intact dogs. These findings were most pronounced in dogs neutered before six months of age and included hip dysplasia, cranial cruciate ligament tears, and elbow dysplasia.

While this evidence does not mean that every early-spayed Labrador will develop orthopedic disease, it does suggest that breeds with a known propensity for these problems, may not be ideal candidates for spaying in their first 12 months.

The case for spaying before the first heat

For many - myself included - the concern with later spaying comes down to a potential increased risk of cancer. Spaying before a female's first estrus, or heat cycle, provides the greatest reduction in mammary tumor risk, and that protection shrinks as the number of heat cycles increases. This is why many veterinarians recommend an early spay.

It is worth noting where the two risks differ by breed. In female Labrador Retrievers, the research on joint disorders and cancers did not find an increase in the tracked cancers above the rate in intact dogs, unlike female Golden Retrievers, where cancer risk was elevated at any spay age. Waiting a few extra months to spay a Labrador does not mean accepting an inevitable cancer problem.

Finding the middle ground

For a large-breed female, many veterinarians recommend a compromise: allow additional skeletal maturation and plan the procedure around 12 to 14 months of age, typically two to three months after the first heat. That's why working to your pet's biological calendar versus your own, is so important. It ultimately comes down to your pet's growth, orthopedic health, household circumstances, and your veterinarian's assessment, rather than a fixed rule of six months or 18 months. And no off-leash walkabouts during this time because the need to avoid accidental breeding is essential.

Does laparoscopic surgery change the timing?

This type of surgery does not impact the hormonal changes of removing the ovaries. If you're not familiar with laparoscopic ovariectomy, it's a surgical option that removes the ovaries through small incisions versus a full-blown surgery. Because it causes less tissue trauma, it makes for an easier recovery period. Think of it as a gentler surgical route, not a solution to the timing question.

Practical next steps

Team up with your veterinarian to build a plan around your dog's growth that monitors her orthopedic development and prevents pregnancy before surgery. Now, because spayed females can become prone to weight gain fdue to hormonal changes that impact metabolism, ask your vet to help you track her body condition, or learn body condition scoring yourself, so that your large, loveable, four-legged family member maintains her healthy weight and lives her best life.