What is Fully Grown Rabbit Age: A Comprehensive Guide

Rabbits are popular pets known for their playful and cuddly nature. An important consideration for rabbit owners and prospective owners alike is understanding the age at which rabbits become fully grown. The age at which a rabbit reaches full growth can depend on factors such as breed and size, so it’s essential to have a general understanding of this aspect of rabbit care.

In general, rabbits reach sexual maturity between 3 and 8 months, and they become fully grown by a year old. However, this can vary across different breeds. For instance, small breed rabbits like the Netherland Dwarf typically reach full growth by 5 months old, while larger rabbits may continue growing until they are 18 months old. Knowing when your rabbit is fully grown can help you provide the appropriate care, including diet and housing adjustments, to ensure a healthy and happy life.

Growth and Maturity

Physical Maturity

Rabbits reach physical maturity at different ages depending on their size and breed. In general, smaller breeds reach their full size faster, maturing at around 4-5 months. Medium-sized breeds typically become fully grown between 6-10 months, while larger breeds, such as Flemish Giants, can take up to 18 months to reach their full size.

During their growth process, baby rabbits (kits) transition through several stages:

  • Newborn (0-3 months): At this stage, kits are highly dependent on their mother’s milk and require constant care.
  • Adolescence (3-6 months): During adolescence, young rabbits begin to explore solid foods and their environment. They also start to develop their adult teeth and coats.
  • Teenager (6-12 months): At this stage, rabbits are nearing their full physical size and their behavior starts to stabilize.

Owners should be aware of changes in their rabbit’s size and development, adjusting their care routines as needed. Proper nutrition is crucial for healthy growth; young rabbits should be fed a uniform formula until they reach 12 months of age.

Sexual Maturity

Sexual maturity in rabbits occurs during the adolescent stage, typically between 3 and 6 months of age. Male rabbits (bucks) usually reach sexual maturity around 3 to 4 months, while female rabbits (does) tend to mature between 5 and 6 months.

It’s essential for rabbit owners to be prepared for their pets’ sexual maturity by taking steps such as spaying or neutering. This not only helps control the rabbit population but also reduces the risk of health issues and aggressive behaviors associated with reproductive hormones.

In conclusion, understanding a rabbit’s growth and maturity milestones is crucial for providing appropriate care and support. By monitoring physical and sexual maturity, rabbit owners can ensure their pets live happy, healthy lives.

Growth Timeline

Rabbits reach full maturity and growth at different ages depending on their breed and size. In general, they go through several stages of growth, which include baby, adolescence, and teenager stages, before finally becoming adults.

Baby Rabbits (Newborn – 3 months)

Baby rabbits, also known as kits, are born hairless, blind, and deaf. During this stage, they rely on their mother’s milk for nourishment. Significant changes occur within the first two weeks of life, including:

  • Day 7: Fur starts to grow
  • Day 10: Eyes begin to open
  • Day 12: Ears open, allowing them to hear

By the end of this stage, baby rabbits start venturing out of their nest and exploring their surroundings.

Adolescence (3 months – 6 months)

During adolescence, rabbits experience rapid growth and start eating solid foods. Their teeth, coat, and behavior undergo development at this stage. It’s important to provide a balanced diet and ample space for them to grow.

Teenager (6 months – 12 months)

In this stage, rabbits continue growing, but at a slower pace. Their full size and weight are mostly determined by their breed and individual factors. Smaller breeds typically reach maturity faster, around 4-5 months, while medium-sized breeds mature around 6-10 months.

For example:

  • Small rabbits: 5-7 months
  • Large rabbits: 7-18 months

Large breeds, like Flemish Giants, can take up to 18 months to reach their adult size. By the time they are 12 months old, most rabbits are considered to be fully grown.

Senior Rabbits

Senior Rabbit

As rabbits age, their growth process comes to an end. However, they still require proper care and a well-balanced diet to maintain their health. Owners should always monitor their rabbits’ weight and overall health throughout their lives, as senior rabbits may face age-related health issues.

During the growth of rabbits, various factors such as breed, size, and individual differences play a role in determining their timeline to adult size. Understanding these stages helps rabbit owners provide the necessary care and monitor their pets’ development.

Rabbit Breeds and Sizes

Rabbits come in various breeds and sizes, with growth rates that depend on their breed. This section discusses small rabbit breeds, medium-sized rabbits, and giant breeds, providing information on their growth periods and adult sizes.

Small Rabbit Breeds

Small rabbit breeds, such as Netherland Dwarfs, typically reach their full size by the age of 5 months old. Other small breeds include:

These breeds usually weigh between 2 to 5 pounds when fully grown.

Medium-Sized Rabbits

Medium-sized rabbit breeds reach their mature size at around 6 to 10 months of age. Some examples of medium-sized breeds are:

Medium rabbits typically weigh from 5 to 12 pounds as adults.

Giant Breeds

Giant rabbit breeds, like the Flemish Giant, take the longest to reach their full size, often taking up to 18 months according to Bunny Horde. Flemish Giants can weigh from 14 to 22 pounds as adults. Other giant breeds include:

  • Giant Chinchilla
  • French Lop
  • British Giant

Adult weights for these breeds vary, but typically, they range from 12 to 22 pounds or more.

Factors Impacting Growth

Several factors can influence when a rabbit becomes fully grown. Some of these factors include genetics, the doe and the buck, differences between wild and domestic rabbits, as well as a rabbit’s behavior and diet.

Genetics play a significant role in determining when a rabbit becomes fully grown. Rabbits with a larger breed lineage will often grow slower and reach their full size much later than smaller breeds. For example, large rabbits may take between 7 and 18 months to mature, while smaller rabbits may reach maturity at 5 to 7 months of age [source].

The health and genetic traits of both the doe (mother rabbit) and the buck (father rabbit) contribute to the growth rate of the offspring. If both the parents are healthy and exhibit desirable traits for their breed, the offspring will likely experience proper growth and maturation.

There’s a distinction between wild and domestic rabbits when it comes to growth patterns. Wild rabbits may grow more quickly, adapting to their dangerous environment, while domestic rabbits may grow at a more relaxed pace due to a safer and controlled setting.

A rabbit’s behavior can also impact its growth. Stressful or hostile environments may stunt a rabbit’s development, while a nurturing and stimulating environment will promote healthy growth. Rabbit owners should provide a comfortable living space, with ample opportunities for play and interaction.

Lastly, a rabbit’s diet greatly affects its growth. A balanced diet, rich in essential nutrients like hay, vegetables, and pellets, will support proper growth throughout their development. Adequate hydration through clean water supply is also crucial for healthy bodily functions and growth.

Taking all these factors into account is essential when considering the appropriate age that rabbits reach full maturity. Providing them with a healthy and nurturing environment is key to ensuring proper growth and development in their lives.

Healthy Weight and Size

Rabbits are generally considered fully grown at around 6 months old, although their growth rate may vary based on breed and individual factors. By reaching this age, they will have attained their full size, weight, and have developed their adult teeth, coat, and behavior. Nevertheless, it’s crucial to monitor and maintain their healthy weight and size throughout their life.

Maintaining a Healthy Weight

To keep your rabbit at a healthy weight, provide a balanced diet consisting mainly of hay, supplemented with vegetables, fruit, and pellets in moderation. Here are some guidelines to follow:

  • Hay should be 80% of their diet; it helps maintain healthy digestion and wear down their teeth.
  • Vegetables provide important nutrients; offer about 1-2 cups per day depending on the rabbit’s size and weight.
  • Fruits should be given occasionally as treats, no more than 1-2 tablespoons per day for a small rabbit and 2-4 tablespoons for a larger rabbit.
  • Provide high-quality pellets in limited quantities, approximately 1/4 cup per 4-6 pounds of rabbit weight.

Monitor your rabbit’s weight regularly and adjust their diet if needed to ensure a healthy weight.

Determining Overweight or Underweight

Checking your rabbit’s body condition is essential for spotting weight issues. To determine if your rabbit is overweight or underweight, you can use the following method:

  1. Feel the rabbit’s ribcage: Ribs should be easy to feel without being too prominent. If you can’t feel them, your rabbit may be overweight. If the ribs are very noticeable, your rabbit might be underweight.
  2. Check the rabbit’s waist: When viewed from above, a healthy rabbit should have a noticeable waistline. A lack of a waist might suggest your rabbit is overweight.
  3. Observe the rabbit’s base of the tail: This area should be smooth and flat. If there is excess fat, your rabbit may be overweight. On the other hand, if the bones are too prominent, your rabbit might be underweight.

Regular visits to the vet can also help track your rabbit’s weight. It’s essential to address any weight issues promptly, as being overweight or underweight can impact a rabbit’s overall health.

Care and Nutrition

Rabbit Nutrition

Rabbits require specific care and nutrition to grow and develop properly. In this section, we will discuss feeding guidelines and exercise requirements for rabbits as they progress through their various life stages.


Rabbits’ nutritional needs change as they grow. In the early stages of their life, they primarily consume their mother’s milk for nourishment. At around 3-4 weeks old, they can gradually start being introduced to solid foods. Some essential components of a rabbit’s diet include:

  • Alfalfa hay: Rich in protein and fiber, alfalfa hay is a crucial food for young rabbits. Providing this type of hay to baby rabbits is important to support their growth and development until they are fully grown.
  • Pellets: As a rabbit grows, it’s important to switch from high protein alfalfa pellets to timothy-based pellets around six months old – this is when a rabbit’s protein needs reduce [source].

A suggested feeding schedule for rabbits of various ages is as follows:

  • 3-4 weeks: Introduce alfalfa hay and high-protein pellets.
  • 5-7 months: Continue alfalfa hay and switch to timothy-based pellets.
  • 1 year and older: Adult rabbits should eat timothy hay and occasional alfalfa hay as a treat.


Exercise plays a crucial role in maintaining a rabbit’s physical and mental health. Providing ample opportunities for exercise helps in preventing obesity, promoting digestion, and enhancing overall well-being. Some important aspects of rabbit exercise include:

  • Space: Ensure that rabbits have an adequately sized play area that allows them to hop, jump, and explore their environment.
  • Toys: Provide interactive toys and enrichment activities to keep rabbits mentally stimulated and physically active.
  • Supervision: Always supervise rabbits during playtime, especially if they are sharing the space with other animals or household members.

In conclusion, proper care and nutrition are essential for a rabbit to grow into a healthy adult. Feeding the right types of hay and pellets, as well as providing exercise opportunities, are critical in supporting their growth and well-being.

Spaying and Neutering

Spaying and neutering are important procedures for rabbits to ensure a healthy and balanced life. These procedures are typically performed when rabbits reach sexual maturity. The age at which your rabbit should be spayed or neutered varies depending on factors such as breed and size.

For the majority of rabbits, sexual maturity is reached at about 3 to 6 months of age. However, giant breeds of rabbits may reach maturity a couple of months later, and the surgery might be done a little later. It’s important to consult with a qualified rabbit veterinarian to determine the best time for spaying or neutering.

Benefits of Spaying and Neutering

Performing these surgical procedures at the right age has numerous benefits:

  • Prevents overpopulation and unwanted pregnancies
  • Reduces territorial behavior and aggression
  • Lowers the risk of reproductive cancers and infections
  • Helps promote a calmer and more affectionate pet

Preparing Your Rabbit for Surgery

Choosing a skilled rabbit veterinarian is crucial for the success of the surgery. Here are a few steps to prepare your rabbit for spaying or neutering:

  1. Consult with your veterinarian about the appropriate age for your rabbit’s surgery
  2. Ensure your rabbit is in good health prior to the procedure
  3. Follow pre-operation instructions provided by the veterinarian

Post-Operation Care

After the surgery, your rabbit will need some extra care to ensure a smooth recovery:

  • Provide a clean, quiet, and comfortable space for your rabbit to rest
  • Monitor your rabbit’s eating, drinking, and elimination habits
  • Check the incision site for any signs of infection or complications
  • Follow your veterinarian’s instructions regarding pain medication and follow-up appointments

Overall, spaying or neutering your rabbit is a responsible and beneficial decision for both their health and well-being. Just make sure to consult with an experienced rabbit veterinarian and closely follow pre- and post-operative care instructions to ensure the best outcome.

Specific Rabbit Breeds

In this section, we will discuss what are fully grown rabbit age and at which age various rabbit breeds are considered fully grown.

Dutch Rabbit

The Dutch Rabbit, a medium-sized breed, typically reaches full growth between 6 and 10 months. This breed is known for its distinctive coloring and friendly personality.

French Lop

The French Lop, a large rabbit breed, takes longer to reach maturity, generally between 10 and 14 months. They are known for their floppy ears and gentle temperament.

Rex Rabbit

Rex Rabbits are medium-sized and reach their full growth at around 6 to 10 months. They are popular for their soft, plush-like fur and sociable nature.

Holland Lop

Holland Lops are a small breed and typically mature around 5 months of age. Their compact size and floppy ears make them a popular choice among rabbit enthusiasts.

Mini Rex

The Mini Rex, smaller than the Standard Rex, usually reaches its full growth by 5 months of age. These rabbits have soft, dense fur and make great pets due to their friendly disposition.

English Angora

English Angora rabbits, a medium-sized breed, reach full growth at about 6 to 10 months. They are known for their long, silky fur which requires regular grooming.


Harlequin rabbits, medium-sized, reach full growth between 6 and 10 months. They are named for their unique color patterns and have a curious and energetic nature.

Standard Rex

Standard Rex rabbits, larger than the Mini Rex, grow to their full size by 6 to 10 months. They have similar temperaments and fur texture to their miniature counterparts.

Netherland Dwarf Rabbit

The Netherland Dwarf Rabbit, the smallest of the breeds discussed here, is considered fully grown by 5 months old. Their small size and cute appearance make them a popular pet choice.