Puppy Spaying and Neutering: When to Do It and Why
Everything about puppy spaying and neutering: difference between procedures, recommended age by breed, real benefits and myths debunked.
Spaying or neutering your puppy is one of the most important decisions you will make as an owner, and also one that generates the most questions and confusion. At what age is it best? What is the difference between spaying and neutering? Does it change the dog's personality? Will they gain weight? This article answers these questions based on current veterinary recommendations.
Spaying vs Neutering: The Difference
Neutering refers to surgical removal of the reproductive organs. In males, orchiectomy (removal of testicles); in females, ovariohysterectomy (removal of ovaries and uterus) or ovariectomy (ovaries only). This completely eliminates sex hormone production.
Recommended Age
- Small and medium breed females: wait for the first heat cycle or just after (6-9 months). Spaying before the first heat drastically reduces mammary tumor risk.
- Large and giant breed females: studies suggest waiting until 12-18 months to allow complete hormonal skeletal development.
- Small and medium breed males: 6-9 months. Neutering reduces risk of perianal adenoma, benign prostatic hyperplasia and testicular tumors.
- Large breed males: 12-18 months. Sex hormones participate in bone growth plate closure; neutering earlier may increase certain orthopedic risks.
Benefits of Spaying/Neutering
- In females: eliminates pyometra risk, reduces mammary tumor risk (up to 99.5% if done before first heat), eliminates heat cycles and false pregnancies.
- In males: eliminates testicular tumor risk, reduces benign prostatic hyperplasia, may decrease hormone-driven behaviors (marking, roaming, intrasexual aggression).
Common Myths
"The dog will gain weight"
Spaying/neutering slightly reduces basal metabolism. But weight gain is not inevitable: by adjusting diet and maintaining exercise, the neutered dog can maintain exactly the same weight. The problem is that many owners do not adjust food portions.
"Their personality will change"
The procedure may reduce behaviors specifically linked to sex hormones. The dog's core personality — affection, sociability, intelligence — does not change.
"It is better to have a litter first"
No scientific evidence supports this myth. Gestation and delivery have no health benefit for the female and increase risk of complications.
Recovery
It is a routine surgery with a relatively straightforward recovery: 7-10 days with restricted physical activity, an Elizabethan collar to prevent licking the wound, and a vet check at 10-14 days. Most puppies recover without complications.
