What are the best ages to spay or neuter pets?

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In addition to helping to control homelessness, spaying and neutering companion animals may have medical and behavioral benefits. Valley News/Courtesy photo

TEMECULA – Animal overpopulation is a concern that affects the well-being of pets. The ASPCA said letting animals reproduce unchecked can lead to pet homelessness that results in millions of healthy cats and dogs being euthanized in the United States and Canada each year.

In addition to helping to control homelessness, spaying and neutering companion animals may have medical and behavioral benefits. As valuable as spaying and neutering can be, the procedures are not without potential complications. Responsible pet owners must weigh the pros and cons of spaying and neutering with a qualified animal professional.

Many veterinarians now recommend female and male dogs be spayed or neutered between the ages of six to nine months. Some vets recommended puppies can be neutered as young as eight weeks old as long as they are healthy. In fact, it has become the norm for rescue puppies to be neutered before being placed with adoptive families. Those who would like to follow the American Animal Hospital Association Canine Life Stage Guidelines should have small-breed dogs under 45 pounds projected adult body weight neutered or spayed at six months of age or before the first heat. Large-breed dogs should be sterilized after growth stops, which is usually between nine and 15 months of age.

The ASPCA said it is generally considered safe for kittens as young as eight weeks old to be spayed or neutered. Doing so can help avoid the start of urine spraying and eliminate the chances for cats to go into heat and become pregnant.

Spaying and neutering has been shown to reduce risk for testicular cancer and some prostate problems. Sterilization also can protect against uterine infections and breast tumors in many female pets. These procedures may also help prevent animals from roaming to find mates or reduce aggression problems.

Some research has pointed out that early neutering may lead to certain medical conditions that may be preventable by waiting until a pup or kitten is a little older before having them go under the knife. Researchers at the University of California Davis conducted a study on golden retrievers in 2013 that found early neutering and spaying appeared to increase the risk of diseases, such as cranial cruciate ligament rupture, hemangiosarcoma, mast cell tumors, lymphosarcoma, and hip dysplasia.

Working with a veterinarian can help pet owners make informed decisions about the appropriate age for a pet’s sterilization.