One of the most frequent questions that arise in consultations is whether or not to sterilize your pet. In general terms, I am in favor of it. However, each case must be analyzed individually to choose the best option for your pet. Below, we will analyze the advantages and disadvantages of sterilization in small animals.
Sterilization in female dogs and cats offers multiple advantages for their health, behavior, and overall well-being. Here are some of the main benefits:
- Prevention of serious diseases
Reduction of the risk of breast cancer: Sterilization before the first heat significantly reduces the likelihood of developing mammary tumors, which can be malignant in many cases.
Elimination of the risk of pyometra: This uterine infection is a serious and potentially life-threatening condition that affects many unspayed female dogs. By removing the uterus and ovaries, this risk is completely eliminated.
Prevention of ovarian and uterine cancer: By removing the reproductive organs, the possibility of developing cancer in them is also eliminated.
- Control of behavior
Reduction of behaviors related to heat: The dog or cat will not have heat cycles, meaning behaviors such as seeking males, territorial marking with urine, and agitation or restlessness will disappear.
Less aggression and fights: In some cases, unspayed female dogs and cats may show aggressive behavior toward other females, which tends to decrease after sterilization.
- Prevents unwanted pregnancies
Sterilization prevents the dog or cat from becoming pregnant, avoiding unplanned litters. This helps reduce animal overpopulation, a common issue that leads to pet abandonment or euthanasia.
- Increased life expectancy
Spayed female dogs and cats tend to live longer as they are protected from multiple reproductive system-related diseases, such as those mentioned above.
- Improved household hygiene
Female dogs will not have bleeding associated with the heat cycle, helping maintain a cleaner home environment.
- Benefit for cohabitation with other dogs/cats
By eliminating the heat cycle, female dogs and cats will not attract the attention of males, making it easier to live with other dogs and cats in the home or public areas.
As you can see, there are multiple advantages to opting to sterilize your female dog or cat, but, like anything, there are also disadvantages and risks, which I describe below:
- Risks associated with surgery
General anesthesia: Like any surgery, sterilization requires anesthesia, which carries a risk, although it is generally low if the animal is healthy and the procedure is performed by qualified professionals.
Postoperative complications: There may be risks of infection, bleeding, or problems with wound healing, although these complications are rare if proper postoperative care is followed.
- Possible weight gain
Risk of obesity: After sterilization, some female dogs and cats may experience a reduced metabolic rate, making them more prone to weight gain. This can be managed with a proper diet and regular exercise, but it requires constant attention.
- Change in behavior
Lethargy or mood changes: Some female dogs and cats may become calmer or less active after sterilization. This is not always negative but can be perceived as a change in personality.
Reduction in territorial behavior: While in most cases this is a benefit, some owners notice that the female may become less protective or territorial, which could influence her guard behavior.
- Urinary incontinence (rare in cats)
In some female dogs, especially large breeds, sterilization can increase the risk of developing urinary incontinence as they age due to the absence of estrogen, which can affect the tone of the urethral sphincter, weakening it and making it difficult to control urine, especially when the dog is relaxed or asleep. This issue can be managed with medication, but it can be an inconvenience for owners.
In this situation, it is often recommended to sterilize her after the first heat and before the second to reduce the risk of incontinence.
- Increased risk of some orthopedic or health problems (rare in cats)
Hip dysplasia or joint problems: Some studies suggest that early sterilization, before the dog has reached full sexual maturity, may be related to a higher risk of orthopedic problems, such as hip dysplasia.
Greater predisposition to certain types of cancer: Although sterilization reduces the risk of some cancers, such as breast or uterine cancer, some studies indicate that it may increase the likelihood of developing other types of cancer, such as osteosarcoma (bone cancer), especially if done too early.
- Possible lack of natural hormonal control
Alteration of hormone levels: Sterilization involves removing the ovaries, which causes the absence of estrogen. These hormonal changes can affect certain physiological processes and, in some cases, may be related to the development of conditions such as hypothyroidism.
- Irreversibility
Once sterilization is done, it cannot be reversed, meaning the female dog will not be able to have offspring in the future. This can be a consideration if there is a possibility that you may want to breed at some point.
Now you have all the information you need to make the best decision about whether to sterilize your female dog or cat, but what about males? Let me explain the advantages and disadvantages of neutering your dog or cat.
Advantages of neutering:
- Prevention of health problems
Reduction of the risk of testicular cancer: Neutering removes the testicles, preventing the development of testicular cancer, a disease that affects some unneutered dogs.
Reduction of the risk of prostate problems: Unneutered dogs are more likely to develop benign prostatic hyperplasia (enlarged prostate), which can cause pain and difficulty urinating or defecating. Neutering significantly reduces this risk.
Prevention of perianal tumors: Intact dogs are more prone to developing perianal tumors (adenomas). Neutering reduces this likelihood.
- Behavioral improvement
Reduction of territorial and marking behaviors: Unneutered dogs often mark their territory by urinating in inappropriate places. Neutering can reduce or eliminate this behavior.
Reduction of aggression: In some dogs, testosterone can increase aggression toward other males. Neutering the dog can reduce these aggressive behaviors, improving coexistence with other dogs.
Less mating-related behaviors: Neutering reduces the desire to escape in search of females in heat and decreases behaviors like mounting people, objects, or other animals.
- Population control
Prevention of unwanted litters: Neutering helps avoid unplanned litters, which is essential in reducing the overpopulation of dogs and abandonment.
- Increased life expectancy
By reducing the risk of reproductive system-related diseases and aggressive behavior, neutered dogs tend to have longer, healthier lives.
Disadvantages of neutering:
- Risks associated with surgery
General anesthesia: Like any surgical intervention, neutering requires anesthesia, which always carries a small risk, especially in older dogs or those with preexisting health issues.
Postoperative complications: There is a risk of infections, inflammation, or problems with wound healing, although these are rare if the postoperative care recommended by the veterinarian is followed.
- In the case of cats, minimal risk of urinary problems
While neutering does not directly cause urinary problems, some studies suggest that neutered cats may be slightly more predisposed to developing urinary obstructions, especially if they are obese. This is more common in male cats due to their anatomy.
- Possible weight gain
After neutering, there is a tendency for dogs and cats to gain weight due to changes in their metabolism. To avoid this, it is essential to adjust their diet and encourage regular physical exercise.
As in the case of females, this is an irreversible procedure. Once done, the male dog will not be able to reproduce, which should be taken into consideration if you are considering breeding at some point.
Conclusions:
As you have seen, the decision to sterilize or neuter your pet has both pros and cons. It is important to consider the specific case of each animal, their lifestyle, and your expectations as a pet owner. Sterilization and neutering can offer significant health and behavioral benefits, but they also come with risks that must be considered. I recommend discussing with your trusted veterinarian before making a final decision and evaluating all the aspects mentioned in this article.