Spay And Neuter: The Pros, The Cons, And Things To Consider


The pros and cons of spaying and neutering

Spay and neuter – that’s a very common thing that we hear almost every day now. Many pet owners approach me and ask my opinion regarding the matter. Some are very supportive towards the spay/neuter program, some are still considering whether their pets need it or not, while some others are hesitant or worried about the side effects of it. So what are the pros and cons of spaying/neutering?

Let’s start with the pros:

  • No off-spring (obviously!).
    Finding homes for your new family members is not as easy as you may think. Every year about 17 million dogs and cats were turned over to animal shelters. Only one out of every 10 taken in to the shelters found a home. This means that over 13.5 million had to be destroyed. The tragedy is that this is unnecessary. Much of the problem could be eliminated by a simple surgery: sterilization. By sterilizing pets, owners can help lower the numbers of unwanted and homeless animal companions.
  • No risk of pyometra in queens and bitches. Pyometra is an infection of the uterus that may occur in dogs and cats. The uterus is generally filled with pus. Removing the whole uterus will eliminate the risk of getting pyometra.
  • Less risk of mammary cancer.
  • No dominance and aggressive behavior.
    Dominance and aggression are often (but not always) related to sexual hormone. Getting your pets spayed and neutered removes their sexual hormone which also removes their dominant and aggressive behavior. This is especially helpful to reduce fights in a pack of male dogs or in a clowder of toms.
  • More gentle, more calm, and more affectionate pets.

Apart from the pros, here are the cons of spaying/neutering:

  • Excessive weight. Neutered pets tend to become fatter because their metabolism is slower once the sexual hormones are removed. This problem can be solved by decreasing your pet’s meal portion and take them for more exercise.
  • Hormonal imbalance and diseases related to it. A few examples of common hormonal imbalance diseases are hypothyroidism and Cushing’s disease. Dr. Karen Becker wrote that Dr. Jack Oliver, who ran the University of Tennessee’s adrenal lab, said that indeed adrenal disease was occurring at epidemic proportions in dogs in the U.S. and was certainly tied to sex hormone imbalance (read full article here).

De-sex, sterile, intact. Which one is better?

Before we start reading the answers, let’s familiarize ourselves with these terms to make sure we’re on the same page:

  1. De-sex: the animals have all their reproduction organs removed. Females do not have ovaries and males do not have testicles anymore. Hence they cannot breed and they don’t have their sexual hormones secreted. Examples of this practice are spay and castration.
  2. Sterile: the animals have their reproduction organ partially removed so they cannot breed and produce offspring, but they still have sexual hormones secreted by ovary or testicle. They still have their sexual hormones and minimal behavioral change is observed. Examples of this practice are tubal ligation, hysterectomy/ovary sparing spay/partial spay (applicable in bitches, but not preferred in queens), and vasectomy.
  3. Intact: no change is made to the animal’s reproductive systems. They still have their reproductive organs and hormones, and can produce offspring.

Spay and castration are the most common methods for de-sexing, but there’s another option called sterilization. If you ask me which one is better, I always opt for sterilization without fully de-sexing the pets. Popular methods of this option are ovary-sparing spay and vasectomy.

In sterilization, your pets will have almost no risk of hormonal imbalance and behavior change is minimal because the reproductive system is kept in a more natural condition than de-sexing.

Bitches which are sterilized but still have at least one ovary intact will still show signs of heat in their behavior. Some people refer this to “clean heat” because there will be no blood, but the bitch will still show heat behaviors.

Should I get my pets fixed?


Like I always say, you know your pet better than anyone else and eventually the decision is yours. However here are a few things to take into consideration before deciding to have your pets de-sexed or sterilized:

  • Indoor or outdoor pets. If you keep your pets indoor all the time and they have no chance to meet (or breed) with neighboring animals, maybe they need neither de-sexing nor sterilization. However if you don’t supervise your pets outside, please sterilize them so you are not contributing to the stray overpopulation problem. Don’t be an irresponsible pet owner who allows your intact pet outside without a leash and direct supervision.
  • Hyperactive and aggressive pets. Aggression and hyperactivity are related to sexual hormone. Most pets become less aggressive and less active after they’re de-sexed because the hormone producing organs are removed. If your pet is highly aggressive and dangerous, de-sexing is an option, but of course a better solution is to contact an animal behaviorist to alter their aggressive behavior.
  • Number of pets. If you have more than one pets in your place, they make hierarchy and normally there’s only one dominant male leading the group. The presence of other dominant males in the group will lead to fighting and possibly injuries. If you experience this problem with your pets it’s better to have them de-sexed.
  • Species of your pets:
    1. Old bitches are prone to pus-filled uterus infection called pyometra. It can’t be treated with antibiotics and the only way to treat is to remove the uterus through surgery. If you have a bitch then you should consider spaying her in her young/adult age. When a bitch is too old, there are higher risks of getting a surgery done on them (for example they may not survive anaesthesia, they make slow recovery, the surgical wound may lead to a complicated health problems, etc) and in this case often the final solution to pyometra is to put them to sleep.
    2. Spaying in queens have less complication and less negative impacts compared to spay in bitches. The only negative impact they will experience is being overweight. No significant case of hormonal imbalance disease has been observed in spayed queens.

The decision to sterilize, spay, or neuter your pet, at what age, and with what technique is a very personal decision that is based on your pet’s breed, temperament, personality, and your commitment to training, lifestyle management, and responsible pet ownership. – Dr. Karen Becker

Ready to make the decision? Or still unsure? Contact me if you still have questions regarding spay and neuter.


Pattaya Field Surgery Trip

This is just the short version. The full story, day-by-day details, and more pictures of the trip can be viewed here.

On September 25, 2015 I went from Chiang Mai to Pattaya to volunteer with Santisook Dog and Cat Rescue Foundation and do free spay/neuter clinics for stray dogs and cats. 900 km covered in 15 hours car ride! I know it was such a long tiring trip, but you know, I can’t say no when it comes to helping animals. And after a hot shower, finally it was time to sleep. We had a queue stray dogs and cats to neuter the next day. Oh dear….

The next morning, we started quite late because we were so tired from the previous day’s long trip. Thanks to Neo from Pattaya Animal Coalition (PAC), the one who organized for this field spay and neuter program, for being so understanding and let us sleep an hour longer before a long surgery day!

We sterilized the tools by using Glutaraldehyde, which is known to be toxic, but is within our budget to spay and neuter over 300 stray animals. We used pet pads as disposable drapes. As you can see from the pictures, even the drugs we use are very basic too. For example, Nembutal is a dangerous drug which is no longer used to anesthetize animals but it’s commonly used to euthanize them.


Surgical tools soaked in a solution of glutaraldehyde.

Disposable drape, cut from a pet pad.

Disposable drape, cut from a pet pad.


Today’s site was a hidden animal shelter outside Pattaya. With two vets did the surgeries, who are an Australian vet and me, we managed to spay 9 female dogs and 3 male dogs in 6 hours of our first day. Subtotal: 12. Total: 12.


Dr Renae from Australia is doing spay.

I was just starting the first spay of that day.

I’m just starting the first spay of that day.

The next day we did surgeries at a beautiful countryside house, which also serves as an animal shelter. The shelter houses at least 300 dogs,100 cats, and 1 cow.

Dr Renae and I are doing spay on the second day of the trip.

Dr Renae and I are doing spay on the second day of the trip.

The surgery started around 11 a.m and ended around 6 p.m. 2nd day: 9 male dogs and 13 bitches. Subtotal: 22. Total: 34.

On our third day, we did surgeries in an ordinary house located within a small village. I heard people came since 6 a.m in the morning to queue for the surgeries. It makes me happy to see how people care about the animals and want to get them fixed, even though they don’t have money. It’s probably my main reason why I volunteer to do these free spay and neuter clinics.

Namfon from Santisook is talking to villagers and pet owners, arranging the queue for surgeries.

Namfon from Santisook is talking to villagers and pet owners, arranging the queue for surgeries.

Dr Renae is doing the first spay of that day.

Dr Renae is doing the first spay of that day.

The 3rd day was the highlight of the trip! We did nearly 12 hours of surgeries, finished at 9.27 p.m and managed to neuter 3 male dogs, 10 bitches, 11 toms, 13 queens! Subtotal: 36. Total: 70.

On our 4th day we went to a Thai navy base. I’m glad to see that the government also contribute and show their care for stray dogs in this country. Just by seeing their hospital it gave me a big smile in the morning.

Finally, a better vet hospital facilities.

Finally, a better vet hospital facilities.

Everyone at the military base seemed to be curious of what we were doing and would like to watch closely. This, however, made me nervous and I felt that if I had done something wrong, they would have punished me for it!

Can you see my nervous face for being watched closely by the military staff? LOL.

Can you see my nervous face for being watched closely by the military staff? LOL.

4th day: 23 dogs and 1 bitch. Subtotal: 24. Total: 96.

The next day, we continued to neuter all dogs at the navy base. We did all the male dogs that day and wanted to continue by spaying all the bitches. Unfortunately, they did not mark the spayed bitches and mix all the spayed and intact bitches together. It is almost impossible for us to check the bitches one by one and try to find which one is spayed and which one is not.

Now let’s talk about the importance of ear notch. Every spayed females, be it dogs, cats, or other animal species, should be marked with ear notch or tattoo when they are spayed. This way we can distinguish them from the intacts and it makes a vet job a lot easier in the future.

Those lucky boys to have this cute vet scrubbed their balls with tender loving care (before cutting them off!).

Those lucky boys to have this cute vet scrubbed their balls with tender loving care (before cutting them off!).

5th day: 26 dogs and 3 bitches. Subtotal: 29. Total: 125.

On our last day, we decided to go back to the first day’s site and neuter all the cats and a few remaining intact dogs.

We had plenty of time today and I did some of the prep before surgeries.

We had plenty of time today and I did some of the prep before surgeries.

6th day: 4 bitches, 5 queens, and 10 toms. Subtotal: 19. Total: 144.

This was the last day of my trip. My back was paining terribly, my fingers have blisters from using scissors, artery clamps, and needle holders, my fingertips and fingernails were brown from touching glutaraldehyde. It was a tiring trip, but thinking about 2 vets, each did 46 hours of surgeries and neutered 144 animals altogether in 6 days, it gave me a feeling of accomplishment!

Here is a group shot for the full team! From left to right: Dr Vincent, Dr Liz, Dr Renae, Namfon, May (restaurant owner who treated us free dinner that night), Neo from PAC, Tong, Atinuch, and a staff from May's restaurant.

Here is a group shot for the full team!
From left to right: Dr Vincent, Dr Liz, Dr Renae, Namfon, May (restaurant owner who treated us free dinner that night), Neo from PAC, Tong, Atinuch, and a staff from May’s restaurant.

We already planned for our next trip to Pattaya or surrounding area around the end of this month. Excited!

If saving animal is your passion and you want to contribute to our spay/neuter clinics, check this crowdfunding campaign and spread the words!


9 Things Every Vet Will Experience

A while ago I posted some experiences being a wildlife vet. I think it’s unfair if I exclude the experiences working at small animal practices. So today I’m sharing my experiences from small animal vet point of view. Here are 9 things you’ll likely experience if you’re a vet:

1. You accidentally mix patient’s name and owner’s name. Yes, it’s a very common mistake that every one of us do. Sometimes the pet’s name is easy to recognize as an animal name, such as Brownie, Fluffy, Princess, but most of times their names are very similar to someone’s names, such as Troy, Alice, Simon, etc.

2. You are not a pervert but you touch animal bums hundreds times a week, thousands times a month. Ewww… I know it sounds gross but admit it, taking your patient’s temperature is one of the most common exam you have to do on a daily (if not hourly) basis.

rabbit butt

Come touch my cute butt! Source: pinterest.com

3. At first you might tremble when you do your first ever surgery, but as your skill improves after tens or hundreds of surgery, you now have a new hobby. Your itchy hands can’t stay away from scalpel and a day without surgery becomes a boring day.

4. When you see an animal with big protruding vein suddenly your mind says “What an easy vein to catheterize!” and when you see intact stray male dogs or cats your mind says “I’m gonna cut your balls!” I know for non vet readers it sounds crazy but trust me, it’s very normal for vets to say those things.

horse jugular vein

5. You become a detective, in some way. When you ask questions to your client regarding their pet’s health, don’t expect them to tell you the truth 100%. Instead, expect to play some detective game to see what they actually do to their pets.

6. You spend at least 6 years in vet school but ironically in your client’s mind your advice sometimes means nothing compared to those who come from pet shop owner. Moreover, your knowledge will be compared to Google, a LOT. Unfortunately a lot of misleading information is easily accessible from Google nowadays. Someone from engineer background writes an article about their own experience regarding their pet’s health and somehow it becomes a reference for your client to say your method is wrong.

vet vs cashier

7. You want the animals to be healthy, thus you are happy to see healthy animals, but hey life is a paradox. I know every vet has a favorite case and somehow you are glad to see an animal suffering from it. I have a friend who loves squeezing abscess and every time she has a patient who suffers from it she always exclaims happily “Yes, I love abscess!” I honestly don’t know which can make her happier: to see the animal heals quickly or to squeeze the pus every day for a month.

8. You are compassionate towards animals but have to be heartless sometimes. You love all your patients, but there are times when you have to put them in a deep peaceful sleep to end their pain. To say it personally, this is my weakest point.

9. There are quiet days, there are busy days. When you have no patients and have no work left to do, you complain about how boring your job is. Somehow someone hears you and within 3 minutes sends an emergency to your clinic. When you are busy scrubbing your hands for emergency surgery, another emergency comes in. Be careful of what you wish for.

Does anyone have interesting vet-related experience that you think we should know? It doesn’t matter if you are an experienced vet, a fresh graduated vet or even a future vet, you are more than welcome to share your experience by commenting below.

being a vet liz



Freshly pressed! Freshly attacked!

So after two years working with peafowls finally today I got my FIRST peacock attack. Really? Can they attack? Of course! All animals have defense mechanism. With this particular peacock, he flew and kicked me in the air! Though I did not do anything to the peacock today, somehow he hated me and attacked me, not only once but twice!

Peacock attack.jpg

Even after the second attack he still made the third and fourth attempt to attack me. Maybe he hated my shirt color, maybe he knew I’m a vet, maybe he knew I would inject one of his friends, or maybe it was just breeding season aggressiveness.

As a bonus for reading this post, here’s a video of me, but without my face in it, checking and injecting a sick peacock. Enjoy!