Why Are Chihuahuas So Angry? Here Is the Reason

There’s no doubt about it, chihuahuas are small angry dogs. But why is that? Chihuahua owners worldwide keep asking, “Why are chihuahuas so angry?” There must be scientific explanations for what makes these creatures so irritable.

Chihuahuas are the smallest of all dog breeds, and they’re also one of the longest-lived. They originated in Mexico, and their name comes from the state of Chihuahua.

Chihuahuas are so angry because of a genetic mutation, their smaller size, and high metabolism rate. Chihuahua’s genetic mutation leads to dwarfism, a condition that leads to the deficiency of somatropin. As a result, the dog develops conditions that lead to anger.

It’s worth noting that dog breeds react differently. For example, most dogs have a tendency to lick blankets, carpets, and furniture as a form of reaction. Being aggressive is one of the ways chihuahuas react.

People argue that because of their small sizes, chihuahuas are easily frightened, and this fear manifests itself as anger. Others claim that chihuahuas are naturally bred to be aggressive. Due to such conflicting sentiments, most chihuahua owners are left with questions like:

  • Is my chihuahua angry because she’s afraid?
  • Is my chihuahua mad because she’s bred to be aggressive?
  • What can I do to eliminate anger from my chihuahua?

Today, you’ll get a detailed scientific answer to the burning question, “Why are chihuahuas so annoying?” You’ll also get tips at the end of the article on reducing or eliminating anger issues from your chihuahua.

They Have a Genetic Mutation That Causes Dwarfism

why are chihuahuas so angry?
Chihuahua playing with a toy

Dwarfism in chihuahuas is a condition caused by a genetic mutation. The genetic mutation leads to a deficiency in somatropin, a growth hormone.

This deficiency stunts the growth of bones, muscles, and organs, resulting in the small size of chihuahuas.

Chihuahuas with dwarfism often have deformities such as short legs, large heads, and protruding eyes.

Dwarfism in chihuahuas leads to:

  • Osteochondrodysplasia (OCD): A condition that causes the cartilage in chihuahuas’ joints to grow improperly. This leads to lack of normal bone growth and bone deformities.
  • Achondroplasia: A condition that prevents the normal formation of cartilage, resulting in shorter bones than they should be.
  • Hydrocephalus: A condition in which too much fluid accumulates in the brain, causing it to swell.

Because of these conditions, the chihuahua dog breed develops physical symptoms linked to anger.

Physical Symptoms of Anger in Chihuahuas Due to Dwarfism

  • Large than normal head: Due to hydrocephalus, chihuahuas’ heads are larger than average. The extra fluid in the brain puts pressure on the skull.
  • Protruding eyes: Chihuahuas’ eyes bulge out of their sockets due to achondroplasia. This makes them very sensitive to light and easily agitated.
  • Short legs: Chihuahuas’ legs are shorter than average due to osteochondrodysplasia. This makes them feel insecure and anxious which is manifested through anger.
  • Crooked teeth due to the shorter jaw: Because of the inability of the bone to properly form, the chihuahua’s teeth often grow in a crooked manner. This increases the level of irritation for the dog.

Just like in human beings, the above symptoms of dwarfism lead to psychological symptoms of anger and agitation in chihuahuas. This illustrates why your chihuahua is so angry and sassy about anything.

Smaller Sizes Compared to Other Dog Breeds

The table below shows the typical sizes and weights of the different types of chihuahuas:

Name ImageSize (Height)weight
Apple head chihuahua6-9 inch6-8 lbs
Long-haired chihuahua5-9 inch3-6 lbs
Short-haired chihuahua6-9 inch2-6 lbs
Deer head chihuahua8-12 inch10 lbs
Teacup chihuahua6-10 inch4-6 lbs
chihuahua sizes

Chihuahua is the smallest of all dog breeds. Fully grown chihuahuas range from 6 to 13 inches in size. On the other hand, a fully grown Germ Shepherd ranges between 24 to 26 inches in size. What does this mean for your chihuahua? They’re often bullied and made fun of which leads to a feeling of insecurity.

This feeling of insecurity is one of the psychological reasons why chihuahuas are so angry. To feel in control, they lash out and become aggressive.

why are chihuahuas so angry?

It’s normal for shorter people to feel insecure when they smell a potential threat. However, because they’re short, they want to be heard, and the threat to know that they can cause an impact by talking too much. The same goes for chihuahuas.

Because of their small sizes, chihuahuas are mistreated by human beings and other dog breeds. This makes them anxious and angry. You’ll notice your chihuahua engage in aggressive behavior like:

  • Barking excessively
  • Growling
  • Biting objects and running around
  • Snapping
  • Nipping
  • Attacking other dogs or animals

They Have a High Metabolism

Chihuahuas have a higher metabolism rate than other dog breeds. This is due to their small size and high body temperature. 

The high metabolism rate means they need more food to maintain their energy levels. However, they often don’t eat enough food because of their small size. Thus, they need to eat regularly to supplement their energy needs.

The high metabolism rate in chihuahuas makes them shiver when they get anxious or excited. You might have noticed your chihuahua shaking when you come home or when they see another dog.

The shivering also makes them unable to regulate body temperatures. This is based on the fact that when an animal has a high metabolic rate, they burn off body heat faster. As a result, your chihuahua may be shivering due to cold even when you don’t feel the cold.

Shivering is a chihuahua’s way of trying to calm down and regulate their body temperature. However, because they’re already so anxious, the shaking only makes them more agitated.

High metabolism in chihuahuas leads to the following:

Cold Weather Woes

Chihuahuas are sensitive to cold regardless of whether they have long or short hair. Due to their high metabolism, lack of body fat, and tiny frames, they can’t tolerate cold weather. 

You’ll notice your chihuahua shaking, shivering, and looking for warmth when the temperature drops. Their anxiety levels also increase during these periods which makes them more prone to anger outbursts.

Nervousness and Fear

The high metabolism rate in chihuahuas also makes them more prone to anxiety and fear. This is because they’re constantly on the lookout for food and trying to regulate their body temperature.

Anxiety and fear constantly lead to chihuahuas lashing out in anger. They become aggressive and bark excessively to try to feel in control.

Seeking Attention

Chihuahuas are also known to be Velcro dogs. This means that they seek constant attention and love from their owners than other dogs. 

If they don’t get the attention they need, they become anxious and stressed. This often leads to them acting out in anger to get your attention.

You might have noticed your chihuahua barking excessively or nipping at you when you don’t give them the attention they need.

In some instances, when a chihuahua wants to attract your attention, she becomes bossy. She will jump on you, sit on you, or follow you around the house more than other dogs. 

While it might be cute at first, this behavior can become irritating and overwhelming. If you don’t give your chihuahua the attention she needs, she will become angry and develop aggressive behavior.

Reacting to New Situations

Chihuahuas are independent animals that are suspicious of new people and animals. This is because they’re not used to change, and they don’t like it when their routine is disrupted.

This suspicious nature leads to fear among chihuahuas which then manifests in anger when they’re in new situations. They become aggressive and bark excessively to try to feel in control.

You might have noticed your chihuahua’s aggression when you take her to the vet or when there’s a new person in the house.

In these situations, it’s essential to remain calm and patient. Try to provide your chihuahua with a safe space where she can feel comfortable and relaxed.

Experiencing Their Period (Female Chihuahuas)

woman holding chihuahua
Woman holding chihuahua

How often do dogs go into heat? You may not know this, but female dogs go into heat twice per year.

“A dog that is in the estrus stage is said to be in heat or in season.”

This means that female dogs experience their periods for between 14 to 20 days each year. During this time, their estrogen levels increase, leading to mood swings and aggression.

It’s worth noting that the interval of the menstrual period for female dogs depends on the breed. Some dog breeds experience their periods once per year; others go into heat every six months, while others thrice a year.

The same thing happens to female chihuahuas. Their estrogen levels increase during their period, which leads to mood swings and aggression. 

You might have noticed your chihuahua’s aggression during her heat cycle. She might bark excessively, nip at you, or become more aggressive.

It’s essential to remain calm and patient during this time. Try to provide your chihuahua with a safe space where she can feel comfortable and relaxed.

Signs That Show a Female Dog Is in Her Period

It might be challenging to tell when your female chihuahua is in her period. This is because the symptoms vary from dog to dog.

Some of the most common signs that show a female chihuahua is in her period include:

  • Bleeding from the vulva
  • Seeking out male dogs
  • Swollen and red vulva
  • Turning her tail to the side
  • Reduced activity level
  • Mount or hump
  • Frequent urination
  • Mood swings
  • Aggression
  • Increased appetite

It’s advisable to be keen on these signs to diagnose if your chihuahua is on heat. You might not be able to notice blood around the house if the dog prides herself on appearance and maintains high standards of cleanliness.

They’ve Been Bred to Be Aggressive

The history of the chihuahua breed is shrouded in mystery. It’s believed that the Techichi breed (ancestors of the chihuahua) were bred to be aggressive animals in Mexico.

This is because they were used for various purposes such as dogfighting and ratting. They needed to be aggressive in order to survive in these situations.

While dogfighting and ratting are no longer popular, aggression has remained in the chihuahua breed.

The Toltecs brought up the Techichi breed to be a companion dog. They were gentle and loving animals that provided companionship and comfort.

However, when the Techichi was brought to Mexico, they were bred with other aggressive breeds such as the Xoloitzcuintli and the Pug. This led to the development of the chihuahua breed as we know it today.

While the exact reason for their aggression is unknown, it’s believed that it’s a result of their history and breeding, passed down from generation to generation.

How to Solve Anger Issues in Chihuahuas

Anger issues in your chihuahua can be solved or controlled if you understand the root cause.

As we’ve seen, there are various reasons why chihuahuas might be aggressive. It could be due to their small size, history, or period.

Once you identify the root cause of your chihuahua’s aggression, start taking steps as illustrated below to control it.

Socializing Them From a Young Age

One of the reasons discussed why chihuahuas are so angry is reacting to new situations. These situations include:

  • New environments
  • People
  • Other animals

You can help your chihuahua overcome their fear of new situations by socializing them from a young age. This involves exposing them to different people, places, and animals in a controlled and safe environment.

The best ways to socialize your chihuahua from a young age include:

  • Joining a puppy class
  • Attending dog training classes
  • Meeting new people with your chihuahua on a leash
  • Visiting different places with your chihuahua on a leash
  • Take them for walks in various environments such as the park, beach, or even the city.

Your chihuahua will get used to different sounds, people, animals, smells, and sights through such socialization. As a result, she will become more confident and less aggressive when encountering new situations.

Providing a Secure and Safe Environment

As we saw earlier, chihuahuas can become aggressive when they feel scared or threatened. You can help your chihuahua feel safe by providing them with a secure and safe environment.

This involves:

  • Creating a safe space for your chihuahua where they can go when they feel scared or threatened. The space should be quiet and free from any potential threats such as other animals or loud noises.
  • Providing them with a comfortable place to sleep and rest. This could be a dog bed in a quiet corner of your house or even their crate.
  • Building up their confidence. This can be done through positive reinforcement training and providing them with lots of love and attention.

Through these measures, your chihuahua will feel secure and safe in their environment which will help to reduce their aggression.

Identifying the Triggers

One of the best ways to control your chihuahua’s aggression is to identify the triggers. Once you know what triggers their aggression, take steps to avoid or remove these triggers from their environment.

Some common triggers for chihuahua aggression include:

  • Other animals
  • Hunger
  • Cold weather
  • Loud noises
  • Strangers
  • Changes in their environment

The best way to identify these triggers is by observing keenly what is in its vicinity. For example, if your chihuahua is aggressive when they see other animals, it’s likely that this is a trigger for their aggression.

Once you’ve identified the trigger, start taking steps to avoid or remove them. For example, if other animals are a trigger for their aggression, avoid taking them to places with other animals such as the park.

You can also work on desensitizing your chihuahua to their triggers. This involves slowly exposing them to their triggers in a controlled and safe environment. For example, if loud noises are a trigger for their aggression, slowly expose them to louder and louder noises over time.

Show Them Love, Care and Attention

One of the best ways to control your chihuahua’s aggression is to show them lots of love and attention. Chihuahuas can become aggressive when they feel neglected.

Because of their small size, chihuahuas require lots of love, care, and attention, especially from mistreatments. Most people and dogs take advantage of the small size of chihuahuas to mistreat them. This should not be the case with you. Take good care of your chihuahua, and you’ll enjoy quality time with her. You can do this by:

  • Brushing their fur regularly
  • Playing with them regularly
  • Taking them for walks
  • Feeding them a healthy diet
  • cuddling and petting them

Through these measures, the chihuahua will feel as part of the family and will be less likely to become aggressive.

Ensuring Your Chihuahua Is in a Warm Environment With Enough Food and Water

Chihuahuas are small dogs, and as such, they are prone to cold weather. This is why it’s crucial to ensure that your chihuahua is in a warm environment.

Moreover, the high metabolism rate of chihuahuas means that they need more food and water than other dogs. Because they burn more heat and energy, they need more food than other dogs to replenish their energy levels.

To sort these issues out:

  • Provide them with a warm blanket or coat in cold weather
  • Give them small meals more often throughout the day
  • Always have fresh water available for them to drink

Positive Reinforcement Techniques to Control Anger

One of the best ways to control your chihuahua’s aggression is through positive reinforcement training. This involves rewarding them when they display desired behaviors.

For example, if you want your chihuahua to stop barking, reward them with a treat every time they remain quiet. Over time, they’ll associate remaining quiet with getting a treat and will be less likely to bark.

Other positive reinforcement techniques include:

  • Praise: Praising them when they display desired behaviors by saying things like “good girl” or “well done.”
  • Petting: Gently petting them when they display desired behaviors.
  • Treats: Giving them a treat when they display desired behaviors.
  • Touch: Touching them softly and gently when they behave well.

Getting Professional Help if the Anger Is Severe

If your chihuahua’s aggression is severe, it’s best to seek professional help from a certified animal behaviorist or trainer. They’ll be able to assess the situation and provide you with tailored advice on dealing with your chihuahua’s aggression.

An animal behaviorist will be able to identify the root cause of your chihuahua’s aggression and provide you with specific advice on how to deal with it.

A certified dog trainer will be able to teach you how to train your chihuahua using positive reinforcement techniques. They can also provide you with valuable tips on avoiding or removing triggers for their aggression.

Wrapping Up

The question, “why are chihuahuas so angry?” denotes that chihuahuas are not given the necessary guidance and care from a young age. Chihuahuas have big personalities when brought up in a loving home with the proper care.

Chihuahuas that are not given the proper love, care, and attention will become aggressive. However, this aggression can be controlled by showing them love and attention, providing them with a warm environment, and using positive reinforcement techniques.

It’s your role as a chihuahua owner to ensure that your cute friend doesn’t become an aggressive ball of fluff by providing her with the love and care she needs.

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Frequently Asked Questions

Why are chihuahuas so shaky?

Chihuahuas are so shaky because of their small size and high metabolism rate which causes them to burn more heat and energy. By burning excessive heat through high metabolism, chihuahuas cannot regulate their body temperature, resulting in them feeling cold and shaky.

Why are chihuahuas so yappy?

Chihuahuas are so yappy because of their instinct to protect their pack (i.e., you and your family). They also bark out of excitement, fear, or boredom. If your chihuahua is barking excessively, find out the cause and take the necessary action.

Why are chihuahuas so annoying?

Chihuahuas are so angry because of their small size, which makes people look down on them. They, therefore, become angry to prove that they’re not to be underestimated. Additionally, chihuahuas are prone to anger because of their high metabolism rate, which causes them to burn more heat and energy. This results in them feeling cold and shaky, which can trigger their aggression.

8 thoughts on “Why Are Chihuahuas So Angry? Here Is the Reason”

  1. Awesome and very informative. When the opportunity to foster/ adopt
    my rescued Chihuahua, I was very hesitant from the first naming of her breed because of being bitten in a snapping manner causing more damage than people realize from someone’s pet hid under the sofa with no warning from the owners and everytime since then I observed aggressive behavior. She came physically in poor shape and was concerned she would be more aggressive.
    It was a shock meeting her coming to me submissive laying her head on my leg as I sat on the floor. She didn’t bark at people, nor dogs, not even cats; At 8 months old ,I figured the rescuers and temporary foster gave her as you suggested, love ,attention and socializing. Yet, the traits you explained here I knew to use and enforce. She still to this day shows the description as you wrote yet not your common behavior from the start. She has given so much love, very smart learning how to bring my shoes as commanded as we get ready to walk and just explaining tricks picks them right up being very intelligent. Being at the vet has been very trying though no matter what and tequires a muzzle not only to protect them but me holding her as well . You have educated and encouraged me even more. Thank you very much.

    • Hi Terry, thanks for this wonderful comment with more insights on the topic. We strive to remain informative and helpful to our readers. ‘ll for sure incorporate your insights into the post. Thank you so much.


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