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Heat

Shih Tzu Heat Cycle

Overview

For Shih Tzu pet parents, understanding the heat cycle of their female canine family member is crucial for providing excellent care. This article covers: What a heat cycle is, signs and symptoms, age of onset and cessation, duration and frequency, red flag signs during the heat cycle, tips for taking care of your little gal during heat and FAQ.

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What is the Heat Cycle in Shih Tzu Dogs?

The heat cycle, also known as the estrus cycle, is a crucial period in the reproductive life of a female Shih Tzu. It is the time when your little gal becomes sexually mature and capable of conceiving puppies. This cycle is nature's way of preparing a female dog for reproduction.

Age of Onset and Cessation

Typically, female Shih Tzu dogs experience their first heat cycle between the ages of 4 to 8 months, but even as late as 12 months may be normal. The age it begins can vary based on individual health and genetic factors. Small breeds like the Shih Tzu tend to reach puberty earlier than larger breeds.


The heat cycle continues throughout a dog's life, unless she is spayed, but the frequency and intensity may decrease with age. Most dogs do not go through menopause as humans do, but older dogs (around 7 years and above) may have less frequent cycles

Signs and Symptoms of Heat in Shih Tzu Dogs

In general, the heat cycle in Shih Tzu dogs, as in other canines, is marked by several physical and behavioral changes. Signs include:


  • Vaginal bleeding (varying in intensity and ranging in color from white to pink to red; dark brown discharge may appear toward the end).
  • Swollen and prominent vulva (up to two or three times its normal size).
  • Increased frequency of urination and/or marking in the house.
  • Behavioral changes including heightened affection, self-licking, clinginess, nesting behavior (making 'dens' and storing away food, toys or other items), restlessness, or a marked interest in male dogs.
  • Some dogs may experience a change in appetite or become more territorial during this period.

The Four Stages of a Heat Cycle 

The cycle is divided into four stages: proestrus, estrus, diestrus, and anestrus. Each stage has its unique characteristics and hormonal profiles.


  1. Proestrus: This is the first stage, where signs like swelling of the vulva and vaginal bleeding may begin though it may not start until the next phase (estrus). Your Shih Tzu may attract male dogs but is not yet receptive to mating. This phase typically lasts 7 to 10 days, but can vary quite a bit.
  2. Estrus: Often called the "heat" stage, this is when your sweet Shih Tzu is fertile and receptive to mating. Discharge is usually noticeable. Hormone levels peak, and ovulation occurs during this time. This phase typically lasts 10 to 14 days, but can vary quite a bit.
  3. Diestrus: Following estrus, this stage signals the end of your dog's fertile period. Hormone levels start to decline, and the body begins to return to its normal state.
  4. Anestrus: This final stage is a period of sexual and hormonal inactivity, lasting until the next heat cycle begins.

Duration and Frequency of the Heat Cycle

Shih Tzu dogs, like most small breeds, have a heat cycle that occurs roughly every six months, but this can range from every four to twelve months.


Each cycle typically lasts about three weeks. 


As mentioned, the cycle is divided into four stages: proestrus, estrus, diestrus, and anestrus. Proestrus, the beginning of the heat cycle, lasts 7 to 10 days (but this varies) and is characterized by the aforementioned signs like vaginal bleeding. Estrus is the period where your sweet Shih Tzu is fertile, lasting about 10 to 14 days, also with bleeding and with lots of variation between dogs. Diestrus and anestrus follow, indicating the end of the cycle and a period of sexual and hormonal inactivity, respectively.


So, the phase of the heat cycle that you will be noticing lasts anywhere from 2 to 3 weeks and occurs about twice per year. 

Red Flags During Heat

If your little gal exhibits signs of severe pain, excessive bleeding, or any form of aggression that is uncharacteristic, it’s crucial to consult a veterinarian. Additionally, any foul-smelling discharge, excessive lethargy, or changes in eating habits that seem concerning should prompt a veterinary visit.

Tips for Caring for Your Female Shih Tzu During Heat

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Caring for your Shih Tzu during her heat cycle requires patience and attentiveness. Here are some tips to ensure her comfort and safety:


  • Maintain Hygiene: Keep your Shih Tzu clean by wiping her down with grooming wipes, like Earthbath wipes, especially around the genital area. This helps prevent infections and keeps her comfortable. Doggie diapers can be used to manage bleeding; one to consider is Paw Inspired Disposable Dog Diapers. During a Shih Tzu's heat cycle, it's okay to give more frequent baths, up to once a week, as long as moisturizing, quality shampoos are used.
  • Provide a Quiet Space: Your little gal might feel more comfortable in a quiet and cozy area of your home where she can rest undisturbed. Even if a Shih Tzu normally sleeps in her human's bed, she may prefer her own bed during her heat cycle.
  • Nutrition and Hydration: Ensure she has access to fresh water and maintain her regular diet, unless she shows changes in appetite.
  • Avoid Unsupervised Outdoor Time: This prevents the risk of mating and exposure to male dogs. Do not underestimate the lengths that an un-neutered male dog will go to reach your female. Males will be able to pick up her scent (both from her and from her urine) from at least one mile away.
  • Professional Advice for Breeding: If you're considering breeding your Shih Tzu (something that should never be taken lightly and a process that requires extensive research and planning), consult the veterinarian for guidance on responsible breeding practices.
  • Monitor Her Health: Regularly check for any signs that fall outside the realm of a normal heat cycle and seek veterinary advice when needed.

FAQ about Shih Tzu Dogs in Heat

Will my dog be in pain?

While no one can say for sure, it is suggested from studies that a female dog's behavior shows that she is aware of her cycle and may indeed feel some cramping or discomfort. Whether due to cramps, nesting behavior, or both, it is not uncommon for a female to want to retreat and rest more than normal.

If a female displays signs of discomfort, it can help to place something warm near her belly. This can be a soft towel that just came out of the dryer or a non-electrical rice heating pad (made to be warm, not hot). 
When during the heat cycle can she become pregnant?

Within the 2 to 3 week cycle that there is noticeable discharge, there is a smaller window of time in which a female will be most fertile. This can vary quite a bit, so any time during the entire cycle should be considered one that a tie could produce a pregnancyThis said, it is often 9 to 10 days from the start of day 1, and this window lasts for 4 to 5 days. 
Will spaying my Shih Tzu stop her from getting her heat cycle?

Yes, once a female is spayed she will not have a heat cycle again. But, there are other important reasons for considering having your dog spayed. While there are a couple of conflicting studies, most veterinary experts agree that spaying a female can greatly increase her life span and prevent some cancers including breast and ovarian cancer. 
Can a female be spayed if she is right about to enter heat?

Technically, yes. However, most veterinarians do not like to do this procedure if a female is so close to starting her cycle. This is not done during a cycle, as this can cause complications. 

A Final Note

Understanding the heat cycle of your Shih Tzu is key to providing her with the best care and ensuring her well-being. Each cycle is a natural process, but it requires careful observation and responsible management. By recognizing the signs and symptoms, knowing what is normal and what is not, and following the tips for care, you can ensure that your sweet Shih Tzu remains healthy and comfortable throughout her heat cycles. Remember, when in doubt, always seek professional veterinary advice to ensure her well-being. 

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