What Age Do Jack Russells Calm Down?

What age do Jack Russells calm down?


Jack Russell Terriers, often simply called Jack Russells, are known for their boundless energy and lively personalities. These small but mighty dogs are a favorite among many dog lovers for their intelligence and feisty nature. However, their high energy levels and spirited demeanor can sometimes be a handful for owners, leading to the inevitable question: “What age do Jack Russells calm down?” In this article, we’ll explore the various stages of a Jack Russell’s life and when you can expect them to mellow out.

The Puppy Stage (0-6 Months)

Jack Russell puppies are known for their extreme enthusiasm and seemingly endless energy. During this early stage of their life, they are like little whirlwinds, constantly exploring their environment and playing vigorously. They are curious, highly trainable, and eager to learn. However, this boundless energy can be overwhelming for their owners. Typically, Jack Russell Terrier puppies begin to calm down a bit after around six months of age. This is when they start to mature physically and mentally, and their energy levels begin to stabilize.

Adolescence (6-18 Months)

The adolescent stage for a Jack Russell can be a bit challenging for both the dog and the owner. During this period, which usually spans from around six to eighteen months of age, Jack Russells may display some teenage-like behavior. They may become more independent and test their boundaries. While they may not be as hyperactive as they were during the puppy stage, they can still be quite energetic and require ample exercise and mental stimulation. Training and consistency are essential during this phase to ensure that they grow into well-behaved adults.

Early Adulthood (18 Months – 3 Years)

Around 18 months to 3 years of age, Jack Russells generally start to settle down further. They become more emotionally mature, and their hyperactive tendencies gradually diminish. However, it’s important to note that they still maintain their playful and spirited nature. They will likely always have a strong desire to play and engage in activities, but their excessive energy levels will become more manageable. During this stage, it’s essential to continue regular exercise and mental stimulation to keep them happy and well-behaved.

Full Adulthood (3+ Years)

As Jack Russells reach full adulthood at around three years of age, they become more even-tempered and less prone to the intense bursts of energy associated with their younger years. While they will always be playful and lively, they tend to calm down significantly during this stage. You’ll find that they become more adaptable to your daily routines and are less likely to engage in destructive behaviors out of boredom. Full-grown Jack Russells are often more inclined to relax with their owners, but they still enjoy a good game of fetch or a brisk walk.

Individual Variations

It’s important to remember that there is no one-size-fits-all answer to the question of when Jack Russells calm down. The timeline for their development and maturity can vary from one dog to another. Some may start to mellow out earlier, while others may remain active well into their adult years. Several factors can influence this variation, including genetics, environment, and individual personality.

1. Genetics: The breed’s characteristics are influenced by genetics. Some Jack Russells may inherit a more relaxed disposition, while others may take after their high-energy ancestors.

2. Exercise and Stimulation: The amount of exercise and mental stimulation a Jack Russell receives can significantly affect their behavior. A well-exercised and mentally engaged dog is more likely to be content and well-behaved.

3. Training: Consistent and effective training plays a crucial role in a Jack Russell’s behavior. Proper training can help them learn self-control and appropriate behavior.

4. Environment: The living environment and lifestyle of a Jack Russell’s owner can also impact their energy levels. A dog that lives in a home with an active family is more likely to stay engaged and active.

Tips for Helping Your Jack Russell Calm Down

While the timing of when your Jack Russell will calm down may vary, there are several things you can do to help them transition into a calmer and more manageable adult dog:

1. Exercise: Ensure that your Jack Russell gets plenty of physical exercise. Daily walks, playtime, and opportunities to run and explore are essential.

2. Mental Stimulation: Engage your dog’s mind with puzzle toys, obedience training, or agility exercises to keep them mentally sharp and prevent boredom.

3. Socialization: Proper socialization with other dogs and people is vital to prevent behavioral issues and anxiety.

4. Consistent Training: Maintain a consistent training routine to reinforce good behavior and minimize undesirable habits.

5. Patience: Understand that Jack Russells have a unique personality, and it may take time for them to settle down. Be patient and loving in your approach.


In conclusion, Jack Russell Terriers are known for their lively and spirited nature, and while they will always have a playful streak, they do tend to calm down as they mature. The exact age at which a Jack Russell calms down can vary from one dog to another, but the most significant changes usually occur between the ages of 6 months to 3 years. By providing ample exercise, mental stimulation, and consistent training, you can help your Jack Russell become a well-behaved and happy adult companion. Remember, their energetic spirit is part of what makes them so endearing, so embrace the journey and enjoy the boundless enthusiasm of your Jack Russell at every stage of their life.

Also Read: What is the Best Age to Neuter a Jack Russell?

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