How Big Is A Chihuahua Brain? THIS May Shock You!

As a dog owner for over 20 years, I’ve always been fascinated by the intelligence and behavior of my furry friends. One particular breed that has always intrigued me is the Chihuahua. These tiny dogs are known for their big personalities and spunky attitudes. But have you ever wondered about the size of their brains?

As a former Chihuahua owner, I’ve always been curious about the capabilities of their brains and how they compare to other breeds. In this article, we’ll explore the size of a Chihuahua’s brain and how it influences their behavior and intelligence. So, if you’re a Chihuahua lover or simply curious about these pint-sized pups, read on to learn more!

How Big is a Chihuahuas Brain?

The average size of a Chihuahua’s brain is approximately 1/10th the size of a human brain. (About the size of a tangering). The average Chihuahua brains weighs in at around 55.10 grams.

However, the size of their brain does not necessarily correlate with their intelligence. Chihuahuas are known for their quick wit and ability to learn and adapt to their environment. Despite their small size, they have a remarkable memory and are capable of problem-solving.

How Much Does a Chihuahua Brain Weigh?

Recent studies suggest that the size of a Chihuahua’s brain is actually relatively large compared to their body size. In fact, the tiny head of a Chihuahua can house a brain the size of a tangerine. According to a study that measured the correlation of brain weight and yawn duration across 23 dog breeds, the mean brain weight of Chihuahuas is 55.10 grams.

Considering the average weight and height of a Chihuahua, a brain that weighs just over 55 grams is certainly large. An average Chihuahua weighs anywhere between 2 and 5 pounds and can stand 6 to 9 inches tall. So in terms of brain-to-body size ratio, it is no wonder Chihuahuas have the largest brain of all dog breeds.

The size of a Chihuahua’s brain may explain their quick wit and ability to learn and adapt to their surroundings. Despite their small size, Chihuahuas are capable of problem-solving and have a remarkable memory. They may also exhibit stubborn or independent behavior at times. But their intelligence and adaptability make them one of the most beloved and popular dog breeds in the world.

What About a Teacup Chihuahuas Brain?

Even though a Teacup Chihuahua is smaller than the standard Chihuahua – their brain is not. It is the same size, weighing in around 55.10 grams, and about the size of a tangerine.

Do Chihuahuas Have The Largest Brain?

Actually, all dogs have about the same sized brain. In terms of brain-to-body size ratio, the size of a Chihuahua brain is the largest of all dog breeds. This means that compared to their body size, their brain is relatively large.

It’s also worth noting that brain size does not necessarily correlate with intelligence. Some of the smartest dog breeds, such as Border Collies and Poodles, have brains that are not necessarily larger than other breeds.

Are Chihuahuas Smart Dogs?

Yes, Chihuahuas are indeed intelligent dogs.

Chihuahuas are known for their quick learning abilities, adaptability, and excellent memory. They can learn new tricks and commands with ease, and they are often used in obedience competitions. They are also very alert and aware of their surroundings, making them great watchdogs.

Despite their small size, Chihuahuas are capable of solving problems and can exhibit independence and stubbornness. This can make training them a bit more challenging, but with proper guidance and patience, they can excel in obedience training.

Is A Chihuahua Brain Too Big For Its Skull?

Fortunately, this is not the case. The skull of a Chihuahua is designed to accommodate their brain size. In fact, their skull is relatively large compared to their body size, which allows for their big brain to fit comfortably.

While Chihuahuas have a relatively large brain compared to their body size, it’s important to note that their skull is not too small for their brain. If a dog’s brain was too big for their skull, it could cause serious health issues and even death.

Are Chihuahuas Smarter Than Cats?

The answer is not straightforward, as intelligence can be difficult to measure in both cats and dogs.

Cats are known for their independent nature and problem-solving skills. They are skilled hunters and can easily navigate their environment. However, they may not be as trainable as dogs, which can make it difficult to compare their intelligence to that of Chihuahuas.

Chihuahuas, on the other hand, are known for their quick wit and adaptability. They are highly trainable and can easily learn new tricks and commands. They are also social animals and enjoy being around their owners.

In terms of problem-solving abilities, Chihuahuas may have the edge over cats, as they are more willing to work with their owners and are eager to please. However, cats may have better navigational skills and be more independent when it comes to problem-solving.

Ultimately, intelligence can vary among individual animals, regardless of their species. Both cats and Chihuahuas have unique qualities and abilities that make them wonderful pets. The important thing is to provide them with the love and care they deserve, and to appreciate their unique personalities.

Study Done on Neuroanatomy

Frontiers in Neuroanatomy conducted a study on dogs verse other animals.

While the study did find that dogs, including Chihuahuas, have a higher degree of folding in their brains than cats, this does not necessarily translate to intelligence.

Brain folding is thought to increase the surface area of the brain, which may allow for more connections and processing power. However, intelligence is a complex trait that involves multiple factors, including memory, problem-solving abilities, and social cognition.

What Can Chihuahuas’ Brains Do?

How big is a chihuahua brain

Here are some of the impressive things that Chihuahuas’ brains are capable of:

Memory and Learning

Chihuahuas have excellent memories and can remember commands and tricks they’ve learned for a long time. They are also highly trainable and can easily learn new tricks and commands with proper training.

Problem Solving

Chihuahuas are intelligent dogs that can solve problems and overcome obstacles. They are quick thinkers and can figure out ways to get what they want, whether it’s attention from their owner or a toy they want to play with.

Social Cognition

Chihuahuas are highly social animals and are known for their ability to form strong bonds with their owners. They are also able to read their owner’s emotions and respond accordingly. Chihuahuas are quick to pick up on cues, both verbal and nonverbal, and are highly attuned to their environment.

Sensory Perception

Chihuahuas have a keen sense of smell and can pick up on scents that are imperceptible to humans. They also have excellent vision and hearing, which allows them to detect even the slightest movement or sound.

Also Read: Can Chihuahuas Swim?

Common Chihuahua Brain Problems

Chihuahuas, like all dogs, they are susceptible to certain health issues, including brain problems. Here are some common Chihuahua brain problems to be aware of:


Hydrocephalus, also known as “water on the brain,” is a condition where there is an excess of cerebrospinal fluid in the brain. This can cause the brain to swell and lead to seizures, blindness, and other neurological problems. Chihuahuas are particularly prone to hydrocephalus because of their small skull size.

Head Trauma

Chihuahuas are also at risk for head trauma due to their small size and delicate features. Even a minor head injury can cause serious brain damage, including bleeding, swelling, and bruising. It’s important to keep your Chihuahua safe and supervise them at all times to prevent accidents.


Seizures are a common neurological problem in Chihuahuas. They can be caused by a variety of factors, including genetics, head trauma, and underlying health conditions. Seizures can range from mild to severe and can lead to loss of consciousness and other complications.

Intervertebral Disc Disease (IVDD)

IVDD is a condition that affects the spinal cord and can cause pain, weakness, and paralysis. Chihuahuas are particularly susceptible to IVDD because of their long backs and short legs. This condition can also affect the nerves in the brain, leading to neurological symptoms.

Cognitive Dysfunction

Cognitive dysfunction, also known as “doggie dementia,” is a condition that affects older dogs and can cause memory loss, disorientation, and other cognitive problems. While Chihuahuas are not necessarily more prone to this condition than other breeds, it is important to be aware of the signs and seek treatment if necessary.


Chihuahuas are small but mighty when it comes to their brains. Despite their tiny size, their brains are relatively large compared to their body size, which could explain their intelligence, adaptability, and problem-solving abilities.

Chihuahuas are quick learners and have remarkable memories, making them highly trainable and obedient dogs. However, they may also exhibit stubborn or independent behavior at times, which can make training them a bit more challenging.

The size of a Chihuahua’s brain may be small, but its capabilities are impressive. From problem-solving to memory retention, Chihuahuas have an intelligence that should not be underestimated. As long as we provide them with proper care, attention, and training, these tiny dogs will continue to amaze us with their remarkable abilities.

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