7 Heartbreaking Signs: How A Dog Says Goodbye To A Sister And Mourns Their Loss

The viral stories of dogs saying emotional goodbyes to their siblings are not just fleeting social media moments; they are powerful evidence of a profound and often underestimated emotional intelligence in our canine companions. As of today, December 18, 2025, veterinary behaviorists and animal welfare experts confirm that dogs experience a complex form of grief, often referred to as "canine grief," when they lose a close companion, whether a littermate, a lifelong housemate, or a human family member. This deep, palpable sadness highlights the strength of the sibling-like bonds forged in multi-dog households, making the final farewell a truly heartbreaking and challenging time for the entire family.

The relationship between two dogs, especially those who have grown up together like sisters, is built on years of shared routines, play, comfort, and mutual companionship. When one passes away, the remaining dog experiences a significant disruption in their social structure and daily life. Understanding this process, from the initial farewell to the months of mourning that may follow, is crucial for owners navigating this difficult period and providing the necessary support for their grieving pet.

The Profound Sibling Bond: Why the Farewell is So Hard

The term "sibling" in a dog context extends beyond biological littermates; it encompasses any canine companion with whom a dog has formed a strong, stable, and affectionate bond. These deep attachments are the foundation for the intense grief a dog experiences after a loss.

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Research, including studies reviewed by the American Kennel Club (AKC), suggests that dogs feel emotions that accompany grief, just as humans do. Their bond is rooted in their pack nature, where companionship provides security and comfort. The loss of a sister is the loss of their primary playmate, their sleeping partner, and a critical part of their daily routine.

Experts often recommend allowing the surviving dog to see and spend time with the deceased companion's body—the "saying goodbye" moment. This final interaction is believed to help the dog process the loss by understanding that their companion is no longer there, rather than simply disappearing. This crucial step can prevent the surviving dog from engaging in prolonged "searching behaviors," which is a common sign of unresolved loss.

7 Unmistakable Signs Your Dog is Grieving a Companion

When a dog mourns the loss of a sister or companion, their grief often manifests as noticeable behavioral changes. These symptoms are not just temporary quirks; they are genuine expressions of distress and a shift in their emotional state. Pet owners should be vigilant for these signs, which can vary in intensity and duration.

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• 1. Lethargy and Increased Sleep: One of the most common signs is a significant reduction in energy. The dog may sleep excessively, appear listless, and be generally disinterested in activities they previously enjoyed, such as walks or play.
• 2. Loss of Appetite: A grieving dog may refuse to eat or drink, or show a marked decrease in their enthusiasm for food. This can lead to rapid weight loss and requires close monitoring to prevent health issues.
• 3. Searching Behaviors: The dog may repeatedly sniff, whine, or actively search for their lost companion in familiar spots around the house, such as the companion’s favorite bed or feeding area.
• 4. Vocalization (Crying/Moaning): Some dogs will exhibit increased vocalization, which can sound like crying, moaning, or a low, mournful howl, especially when alone or at night.
• 5. Clinginess or Isolation: A dog's attachment style may change dramatically. They may become overly clingy and anxious, constantly seeking comfort from their human family, or conversely, they may retreat and isolate themselves.
• 6. Changes in Routine: Any disruption to established habits, such as house-soiling accidents, a reluctance to go outside, or not greeting owners at the door, can be a sign of distress.
• 7. Anxiety and Stress: The surviving dog may show classic signs of stress, such as pacing, panting without exertion, trembling, or destructive behaviors, all linked to the emotional turmoil they are experiencing.

These behavioral changes are strongly associated with the quality of the dog’s relationship with their lost companion. Friendly, close relationships typically result in more pronounced signs of mourning.

Expert-Backed Ways to Help Your Dog Cope with Loss

Helping a dog through the grieving process requires patience, consistency, and a mindful approach to their emotional needs. Veterinary professionals and certified animal behaviorists offer several practical strategies to support a grieving dog.

Maintain Routine and Structure

Dogs thrive on predictability. Maintaining their regular feeding, walking, and playtime schedules provides a sense of security and normalcy in a time of emotional upheaval. A consistent routine helps to ground the dog and reduces anxiety caused by the companion's absence.

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Provide Comforting Scents and Objects

The scent of the lost companion can be both a source of comfort and a reminder of the loss. Experts, like those at Chewy, suggest keeping a blanket or a favorite toy that carries the scent of the deceased dog. This familiar odor can help ease the surviving dog’s sense of loss and provide reassurance.

Increase Positive Interaction and Exercise

It is important to increase the quality and quantity of one-on-one time with the surviving dog. This includes engaging them in activities they enjoy, such as new training sessions, puzzle toys, or a trip to a dog-friendly park (if they are social). The goal is to gently redirect their focus and encourage positive emotional responses.

Allow Time and Space for Mourning

Grief is a natural process, and there is no set timeline for how long a dog will mourn. It is essential to allow the dog the time and space to process their feelings without pressure. Patricia McConnell, a certified applied animal behaviorist, emphasizes the importance of acceptance and allowing the dog to grieve in their own way.

Consult a Veterinarian or Behaviorist

If a dog's grief is severe—manifesting as extreme loss of appetite, dangerous weight loss, or prolonged depression—it is vital to consult a veterinarian. They can rule out any underlying medical issues and, if necessary, refer you to a veterinary behaviorist who can offer specialized support or discuss calming aids. End-of-life care vets, such as Dr. Woodruff, often provide guidance on recognizing and supporting a grieving dog.

The emotional farewell a dog gives to a sister is a testament to the profound, complex love that exists in the animal kingdom. By understanding the signs of canine grief and implementing these expert-backed coping strategies, owners can help their devoted pets navigate the pain of loss and eventually find peace in their new normal.