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Bonded Pair or Littermate Syndrome? Everything You Need to Know

Littermate syndrome is a troubling behavioral condition that emerges when two puppies, even from separate litters but close in age, are raised together under one roof. Some shelters and rescue organizations naively label these duos as “bonded,” tragically sealing their fates and setting them up for failure from the start. It’s important for pet parents to be informed of the risks while raising two dogs at once, and this is what this post aims to accomplish.

While it may seem ideal and even cute to have two puppies grow up together, as they can provide companionship to one another and share playtime when supervised. This situation can unfortunately lead to a host of complex behavioral problems that need intervention as soon as possible, primarily codependency and aggression if not actively prevented by their pet parents.

Such issues often arise because these puppies rely heavily on each other for social interaction, which can hinder their ability to develop independence and confidence in themselves as individual dogs.
two dogs on the grass; littermate syndrome post
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Understanding Littermate Syndrome at it’s Core

Littermate syndrome often strikes when two puppies are raised in a home at the same time, sharing every facet of their lives—from their environment to their training and socialization. Sure, it sounds like a dream come true for pet owners—double the puppies, double the joy, right? It’s easier to just do everything together! Wrong. This seemingly adorable scenario can quickly turn into a nightmare without a solid management plan, warranting professional intervention. For most households, this isn’t just a bad idea; it’s a recipe for disaster.

As they grow, they may become overly reliant on each other for comfort and security, leading to potential behavioral issues. This dependence may manifest in various ways, including increased anxiety when separated, difficulty in learning commands, and trouble socializing with other pets or people outside their immediate household.

Signs of Codependency

Here are some clues to determine if littermate syndrome may be developing:

  • Excessive Clinginess: The puppies may refuse to be separated from each other, showing distress when apart; this can show as early as 12 weeks old, or as late as a few years old. They may become restless when alone or aggressive when directly handled.

  • Lack of Individuality: They may exhibit similar behaviors, making it difficult to identify their unique personalities. This can become hazardous in the event that these behaviors are rooted in anxiety or stress, further increasing the likelihood of injury or aggression.

  • Poor Adaptability: Littermates might struggle to adapt to change or new situations, leading to further isolation and dependency on each other: a new dog walker, a baby, an additional pet, etc. and as a result, they may start fights with other dogs or snap at house guests.

  • Separation or Generalized Anxiety: Separation anxiety can become prevalent, which can cause destructive behavior even while crated, leading to significant stress for both the pet and the owner. It can also manifest as shutting down while in new situations or meeting new people. This sometimes necessitates professional training to help manage and alleviate the symptoms effectively, combined with medical intervention and medication.

Development of Aggression

As the dogs mature, the codependency can take a darker turn and go from cute play sessions & inseparable bonding to unmanageable fighting that no owner wants to witness. The once cheerful antics that brought smiles may become overshadowed by rising tensions, as the close bond between the dogs begins to morph into competitive behavior fueled by jealousy and competition.

angry dog in close up photography
Photo by Alexas Fotos on Pexels.com

This dramatic shift in dynamics often spirals into an unsafe situation, where growls and fierce snaps replace what was once innocent play. A sudden transformation such as this not only darkens the atmosphere but escalates tensions within the household, turning it into a hazard for both pets and people. If this hostility is allowed to fester, the consequences can be severe and even lead to the death of one or multiple dogs.

As these behaviors become more pronounced, the risk of injury increases, and the once-harmonious home can quickly turn toxic, necessitating urgent attention and intervention to restore peace and safety for everyone involved.

In extreme cases, the dogs affected need to remain separated for the duration that they live together if rehoming is not an option and professional intervention is not successful.

Mitigating the Risks of Littermate Syndrome

Separate Training

Train your dogs separately to encourage independence and build individual skills, allowing each dog to develop their unique abilities and confidence. Start small and slow, with lots of rewards.

dog running on grass
Fetch Training Photo by Matthias Zomer on Pexels.com

By focusing on their specific needs and personalities, training sessions can be tailored, which not only increases their motivation but also helps in overcoming behavioral issues. This method fosters a stronger bond between the owner and each dog while promoting a healthy coexistence among the dogs.

Consistent Socialization

Expose each dog individually to different environments and experiences individually to enhance their willingness to engage in new situations. This can include introducing them to various things they may encounter in everyday life, even just observing from afar.

purebred dog looking out of vehicle glass
Dog in the Car, Photo by cottonbro studio on Pexels.com

Gradually allow them to explore new sounds, sights, and smells, ensuring that the experiences are positive and rewarding. Taking regular walks in different neighborhoods can help them become accustomed to a variety of stimuli and teach them how to behave in diverse settings, not just near their home.

Consistent socialization not only builds confidence but also promotes overall well-being, helping dogs develop into well-adjusted companions.

One-on-One Time

Spend quality time with each dog individually to foster a strong bond and reduce anxiety about separation. Engage in activities that your dog enjoys, such as playing fetch, going for walks, or practicing basic training commands away from your other dogs.

This dedicated attention not only helps to strengthen your relationship but also allows you to better understand your dog’s unique personality and needs.

woman wearing knitted sweater lying with white dog on the couch
Cuddling Dog Photo by Kaboompics.com on Pexels.com

By establishing a routine that includes individual playtime and cuddles, you can create a sense of security and comfort for your dog, making them feel valued and loved.

Positive Reinforcement

Use treats and praise to reward good behavior during training sessions, as these positive reinforcement methods not only encourage desirable actions but also strengthen the trust between you and your dog.

black dog eating treats
Photo by Blue Bird on Pexels.com

By consistently acknowledging their efforts through small rewards and encouraging words, you foster an environment of trust and excitement, making their experience more enjoyable and less competitive.

During supervised positive interactions with each other, take the opportunity to reinforce good behavior with treats and praise, turning every moment into a valuable chance for growth and behavior modification.

Structured Activities

Engage each dog in specific activities tailored to their abilities, ensuring that they remain stimulated both physically and mentally without relying on each other. This means that there needs to be a consistent schedule, and in some cases, professional training.

dog jumping mid air for frisbee disk
Disc Competition Photo by Aliaksei Semirski on Pexels.com

Consider developing routines that allow for socialization outside of your home with each dog separately, as this can enhance their adaptability over time. Socialization doesn’t mean forcing them to meet new dogs or people, it means allowing them to experience new stimuli under positive conditions: in the car, on a walk, during training, etc.

By observing their individual preferences and strengths, you can design a diverse schedule that keeps their tails wagging and promotes a happy, healthy lifestyle.

Daily Routine Establishment

Maintain a consistent daily routine for each dog to provide stability and security, as this helps them understand what to expect each day which may help in reducing overall anxiety that comes with a multi-pet household. For additional insights on multi-pet households, click here.

young couple with dogs relaxing at home
Photo by Impact Dog Crates on Pexels.com

Incorporating regular and separate feeding times, daily walks, and play sessions will help them feel more relaxed, while also strengthening the bond between the dog and its owner.

Health Checks

Schedule regular veterinary check-ups for each dog to monitor their health. You may be tempted to bring both dogs at once, but allowing for this time apart is beneficial long-term.

These visits provide an opportunity for pet owners to discuss any behavioral changes, dietary concerns, or specific needs related to the breed or age of the dog, ensuring personalized care that adapts over time especially with the addition of new pets.

a veterinarian checking a sick dog using a stethoscope
Photo by Tima Miroshnichenko on Pexels.com

Keeping detailed health records will also assist veterinarians in identifying trends and changes in health over each dog’s lifetime, which can help determine whether or not their behavior is related to littermate syndrome or if there is another cause.

Prevention is Key

While raising two puppies together can be both rewarding and enjoyable, it requires careful attention to their development to avoid littermate syndrome. Avoid rescues and breeders who allow two puppies of the same age to go to the same household; for more information on ethically sourcing a puppy, check out this post.

It is essential to dedicate time to each puppy separately, allowing them to explore their own personalities while cultivating a strong bond between themselves and their human companions. This approach not only fosters healthier relationships with their owners but also enhances each dog’s confidence, leading to a more balanced and well-adjusted adulthood.

By incorporating activities that encourage independence, such as solo walks or individual playtime, owners can significantly contribute to the puppies’ social development and overall well-being.

These strategies combined can prevent the development of littermate syndrome, as well as help mitigate the behaviors that do show.

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