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(503) 761-2330
12515 SE Division St
Portland, OR 97236

Spay and Neuter

Why should I have my cat neutered?

Neutering and castration are the common terms used to describe the surgical procedure known scientifically as orchidectomy or orchiectomy. In this procedure, both testicles are removed in order to sterilize a male cat.

Once a male cat reaches puberty, he will develop a number of behavioral changes that will make him a less desirable pet. He will become territorial and start to mark areas, even inside the house, by spraying urine. This urine has a particularly offensive odor that is difficult to remove. As the tomcat reaches sexual maturity, he will start to enlarge his territory, straying ever farther from the house, particularly at night.

By increasing the size of his territory, he increases the likelihood that he will encounter other cats and get into fights for territorial dominance. The longer a tomcat sprays and fights, the less likely neutering will stop these behaviors.

Fight wounds can result in severe infections and abscesses. Diseases such as FIV and FeLV, which cause immunosuppression and AIDS-like syndromes, are spread through cat bites. These incurable diseases tend to be more common in non-neutered male cats last, but not least, humane societies and animal shelters are overrun with unwanted kittens and cats, and neutering decreases the number of needless deaths.

When should I have my cat neutered?

In most cases, it is recommended to neuter your cat before the onset of puberty. Puberty normally begins between six and ten months of age. Our veterinarians recommend castration at around five to seven months of age, although it is becoming more common to perform this procedure at an earlier age, such as two to three months, in an attempt to control pet overpopulation.

Why should I have my cat spayed?

Spaying is the common term used to describe the surgical procedure known scientifically as an ovariohysterectomy. In this procedure, the ovaries and uterus are removed completely in order to sterilize a female cat.

We recommend that all non-breeding cats be sterilized. Several health benefits are associated with spaying your cat. First, spaying eliminates the risk of ovarian and uterine cancers. Second, breast cancer is the number one type of cancer diagnosed in intact or un-spayed female cats. Over 85% of mammary tumors in cats are malignant and most of these have an aggressive biologic behavior (i.e., mammary tumors in cats tend to be locally invasive and spread elsewhere in the body). Cats spayed before 6 months of age have a 7-times reduced risk of developing mammary cancer and spaying at any age reduces the risk of mammary tumors by 40% to 60% in cats.

Finally, cats with diabetes or epilepsy should be spayed to prevent hormonal changes that may interfere with medications.

Are there benefits to spaying my cat?

“There is no behavioral, medical or scientific reason for letting your cat have a litter before she is spayed.”

The most obvious benefit is the prevention of unplanned pregnancies. There is no behavioral, medical or scientific reason for letting your cat have a litter before she is spayed.

Once a cat reaches puberty, usually at around seven months of age, she will have a heat or estrus cycle every two to three weeks for most of the year, unless she becomes pregnant. She will be “in heat” or receptive to mating for approximately one week in each cycle. During “heat”, she may display unsociable behavior such as loud and persistent crying and frequent rubbing and rolling on the floor. This behavior coupled with her scent, will attract male cats from miles around. Removal of the ovaries will stop her estrus cycles.

When should I have my cat spayed?

Spaying should be performed before the first estrus or “heat cycle”. Most cats are spayed between four and six months of age.