When it comes to the mesmerizing blue eyes of French Bulldogs, many people wonder how long they will retain their unique color. It’s fascinating to discover that the blue eyes of French Bulldogs are actually a result of a genetic trait known as the “dilute gene.” This gene affects the pigmentation of the iris, causing it to appear blue. But how long do these captivating blue eyes stay blue?

The duration for which French Bulldogs’ eyes stay blue varies from dog to dog. Generally, their eyes begin to change color within the first few weeks of life, transitioning from blue to their permanent color. By the time they are around 9 to 12 weeks old, most French Bulldogs will have developed their final eye color, which can range from shades of brown to hazel or green. So, while their blue eyes may not last forever, the process of watching them transition can be a beautiful and exciting experience for owners of these charming dogs.

how long do french bulldogs eyes stay blue?
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The Changing Eye Color of French Bulldogs

The French Bulldog is a popular breed known for its unique appearance and charming personality. One distinct feature of French Bulldogs is their eye color, which can vary depending on their age. Many French Bulldogs are born with blue eyes, but the question arises: how long do French Bulldogs’ eyes stay blue? Let’s delve into this fascinating topic and explore the changes that occur in the eye color of French Bulldogs as they grow.

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It’s important to note that not all French Bulldogs are born with blue eyes. Some French Bulldogs are born with dark-colored eyes, which eventually change as they mature. However, for the French Bulldogs that do have blue eyes at birth, the duration of how long their eyes stay blue can differ from one individual to another. Generally, the blue color in French Bulldogs’ eyes starts to fade as they reach a certain age.

The duration for which a French Bulldog’s eyes stay blue is typically around 4 to 8 weeks. During this time, the blue color gradually fades and is replaced by the final eye color that the dog will have as an adult. It’s important to note that the transition from blue to the final color may vary, and some French Bulldogs may experience a more gradual change compared to others.

Factors That Influence Eye Color Change

Several factors can influence how long a French Bulldog’s eyes stay blue. These factors can include genetics, pigmentation, and the individual dog’s unique development. Let’s explore these factors in more detail:


The genes inherited from a French Bulldog’s parents play a significant role in determining how long their eyes will stay blue. If a French Bulldog comes from a lineage of dogs with a longer duration of blue eye color, they are more likely to retain their blue eyes for a longer period. On the other hand, if their lineage has a shorter duration, their eyes may transition to their final color at a younger age.


Pigmentation also plays a role in the development of eye color in French Bulldogs. The presence of pigments in the iris determines the final color of the eyes. As the blue color fades, the pigmentation in the iris becomes more prominent, leading to the development of the final eye color. The rate at which this pigmentation occurs can vary from dog to dog.

Individual Development

Each French Bulldog is unique and may undergo individual development at their own pace. Some dogs may have a slower transition from blue eyes to the final color, while others may experience a more rapid change. This individual development can be influenced by various factors, including overall growth rate and hormonal changes.

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Understanding the Final Eye Color in French Bulldogs

Once the blue color fades, French Bulldogs’ eyes will settle into their final color. The final eye color can vary and can include shades of brown, hazel, green, or blue, depending on the dog’s genetics. It’s important to note that French Bulldogs are prone to certain genetic eye conditions such as cataracts and cherry eye. Regular eye check-ups with a veterinarian are crucial to ensure the overall health and well-being of your French Bulldog’s eyes.


In conclusion, the duration for which a French Bulldog’s eyes stay blue can range from 4 to 8 weeks. This period marks the transition from blue eyes to the final eye color that the dog will have as an adult. Factors such as genetics, pigmentation, and individual development can influence the timing of this color change. It’s important to embrace and enjoy the unique features and characteristics of your French Bulldog, including their eye color.

Key Takeaways: How Long Do French Bulldogs’ Eyes Stay Blue?

  • French Bulldogs’ eyes are usually blue when they are born.
  • The blue color in their eyes is a result of a temporary pigment called iris melanin.
  • Typically, French Bulldogs’ eyes start changing color around 6 to 8 weeks of age.
  • By the time they are 12 to 16 weeks old, their eyes usually reach their permanent color.
  • Most French Bulldogs’ eyes will transition from blue to darker shades like brown, hazel, or green.

Frequently Asked Questions

In this section, we will answer some common questions about the duration of time that French Bulldog puppies’ eyes stay blue.

1. How long do French Bulldog puppies’ eyes stay blue?

French Bulldog puppies are born with blue eyes, which is a unique trait of their breed. However, the duration for which their eyes stay blue can vary. On average, French Bulldog puppies’ eyes begin to change color around 6 to 8 weeks of age. By the time they are 12 to 16 weeks old, their eyes usually reach their final color, which can be anything from brown to hazel or even a lighter shade of blue.

It’s important to note that the exact timing of the eye color change can depend on various factors, including genetics and individual development. Some French Bulldogs may retain a blue hue in their eyes for a longer period, while others may see the color change sooner. However, by the time they reach their adult stage, the majority of French Bulldogs no longer have blue eyes.

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2. What causes French Bulldog puppies’ eyes to change color?

The change in French Bulldog puppies’ eye color is primarily due to the development and maturation of the pigmentation in their iris. When they are born, the iris of their eyes lacks melanin, which gives them the blue color. As the puppies grow, their eyes produce more melanin, which leads to the gradual change in eye color. The presence and amount of melanin determine the final color of their eyes.

This change in eye color is a natural process and is not indicative of any health issues. It is simply a part of the normal growth and development of a French Bulldog puppy.

3. Can French Bulldog puppies’ eyes turn back to blue after they change color?

Once a French Bulldog puppy’s eyes have changed color, it is highly unlikely for them to turn back to blue. The transition from blue to their final eye color is a permanent change. While there may be variations in shades and intensity of the final color, blue eyes are typically not one of the expected outcomes in adult French Bulldogs.

4. Are all French Bulldog puppies born with blue eyes?

Yes, most French Bulldog puppies are born with blue eyes. This is a characteristic trait of the breed. However, it’s essential to note that there can be individual variations, and not all French Bulldog puppies may have blue eyes at birth. In some cases, their eyes can be a shade of gray or even brown. The blue eye color usually develops in the following weeks after birth.

5. Do adult French Bulldogs ever have blue eyes?

While it is possible for adult French Bulldogs to have blue eyes, it is relatively rare. Blue eyes in adult French Bulldogs are usually associated with a genetic anomaly, such as the Merle gene. The Merle gene can cause a dilution of pigmentation in the iris, leading to a blue eye color. However, not all French Bulldogs with the Merle gene will have blue eyes, and it’s important to note that breeding Merle to Merle can have health implications for the puppies.

In most cases, adult French Bulldogs will have eye colors that range from brown to hazel, depending on their genetics and individual traits.

how long do french bulldogs eyes stay blue? 2
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How To Tell If Your French Bulldog Puppy’s Eyes Will Stay Blue?

French Bulldogs may have blue eyes when they are puppies, but the color usually changes as they grow older. Most French Bulldogs’ eye color changes from blue to a different shade by the time they are three months old.

It is important to note that the duration of blue eyes can vary from dog to dog, and some may retain blue eyes for a longer period. However, in general, French Bulldogs’ eyes typically stop being blue at around three months of age.

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