Do dogs actually grieve when another dog in the home dies?

A widely cited 2022 survey published in Scientific Reports by researchers at the University of Milan surveyed more than 400 Italian dog owners who had experienced the death of a resident dog, and found that 86% of respondents reported at least one behavioral change in the surviving dog, most commonly seeking more attention from their owner and becoming more fearful or clingy (Uccheddu et al., 2022, Scientific Reports). The study is one of the largest formal attempts to quantify what dog owners have described anecdotally for generations, and its authors were careful to note they measured owner-observed behavior change, not a validated internal emotional state.

The same study found that the intensity and duration of behavior change correlated with how strong the relationship between the two dogs had been — dogs that had lived together longer, or that regularly played and slept together, showed more pronounced changes than dogs that had merely coexisted (Uccheddu et al., 2022, Scientific Reports). This matches what many veterinary behaviorists observe clinically: a bonded pair separated by death tends to produce a stronger reaction in the survivor than two dogs that tolerated each other but weren't affectionate.

What are the first signs a surviving dog is struggling after a companion's death?

The most frequently reported changes in the Milan survey were increased attention-seeking (67%), reduced appetite (54%), and increased sleep or lethargy (35%), while a smaller subset of dogs became more vocal, more restless, or started sleeping in the deceased dog's favorite spot (Uccheddu et al., 2022, Scientific Reports). Veterinary behaviorists at Cornell's Riney Canine Health Center note that these patterns overlap heavily with the signs of general stress and anxiety in dogs, which makes sense given that loss of a companion is, physiologically, a major disruption to a dog's routine and social structure.

Some dogs also search actively — checking the yard, whining at a closed door, or repeatedly returning to a bed or crate that belonged to the dog that died. This searching behavior typically peaks in the first one to two weeks after the loss and gradually tapers, though the exact timeline varies widely by individual dog and by how abrupt or prolonged the separation was.

Why do some dogs react so much more strongly to a companion's death than others?

Attachment style plays a large role. Dogs that shared a strong bond — regular co-sleeping, mutual grooming, synchronized play — are more likely to show marked appetite and activity changes than dogs from the same household who kept more independent routines, according to the behavioral data from the University of Milan cohort (Uccheddu et al., 2022, Scientific Reports). Age and health status of the surviving dog also matter: senior dogs or dogs with existing anxiety diagnoses may take longer to stabilize.

How the death occurred also shapes the response. A companion animal who is hospitalized and never returns home, versus one who declines gradually at home and can be sniffed and interacted with in the hours after death, may produce different reactions in the survivor. Some veterinary behaviorists recommend allowing a surviving dog brief, supervised access to a deceased companion's body when medically and logistically feasible, on the theory that this may help the dog register the absence, though there is no controlled clinical trial confirming this reduces subsequent distress.

How can you tell the difference between normal grief behavior and a medical problem?

Because appetite loss, lethargy, and withdrawal are hallmark signs of both grief-related stress and underlying illness, the American Animal Hospital Association (AAHA) recommends a veterinary exam for any dog that stops eating for more than 24 to 48 hours or shows persistent lethargy after a household change, since conditions like gastrointestinal disease, pain, or thyroid dysfunction can produce nearly identical symptoms (American Animal Hospital Association, 2023). Ruling out physical illness first prevents an owner from attributing a genuine medical problem to grief and delaying treatment.

A useful clinical distinction is duration and trajectory: grief-related behavior changes in dogs typically show gradual improvement over two to six weeks as the household settles into a new routine, whereas a medical problem tends to persist or worsen without intervention. If a dog's appetite, energy, or elimination habits are not trending back toward normal within that window, that is the signal to involve a veterinarian rather than assume the dog is still "mourning."

What can owners do at home to help a grieving dog adjust?

Maintaining a predictable daily schedule — consistent feeding times, walks, and bedtime routines — helps reduce the general stress load on a dog whose household structure has just changed, a principle consistent with broader canine enrichment guidance from the ASPCA on managing anxiety and behavior change (ASPCA, n.d.). Encouraging normal activity through short walks and low-key play, even when a dog seems uninterested at first, can help prevent the lethargy from compounding into full behavioral withdrawal.

Increasing one-on-one attention temporarily, without inadvertently rewarding excessive clinginess long-term, is a balance many behaviorists recommend: give the dog extra calm affection and physical activity, but avoid creating a new dependency pattern that will itself become distressing if the owner is later unavailable. Introducing a new companion animal too soon, before the surviving dog has stabilized, is generally discouraged since it adds another adjustment on top of an already disrupted routine.

Should you get a new dog right away to help a grieving dog cope?

Veterinary behaviorists generally advise against rushing to add a new dog specifically to "fix" a grieving companion's behavior, since a new dog changes the household dynamic again and doesn't guarantee the surviving dog will bond with the newcomer the way it bonded with the dog that died. The AAHA's canine life stage guidelines emphasize that major household transitions are best spaced out to allow a dog's stress response to fully settle before introducing another one (American Animal Hospital Association, 2023).

If an owner does plan to bring home another dog, waiting at least several weeks to a couple of months, and doing a gradual, supervised introduction once the resident dog's appetite, sleep, and activity levels have returned to baseline, gives the best chance of a smooth transition. The decision should be based on the surviving dog's actual recovery, not a fixed calendar date.

How long does canine grief typically last, and does every dog show it?

In the Milan survey, most owners reported that behavior changes lasted from two to six months, though a subset described changes persisting longer, particularly in older dogs or in pairs with an unusually strong bond (Uccheddu et al., 2022, Scientific Reports). Not every dog shows an observable reaction — roughly 14% of owners in that study reported no noticeable change at all in the surviving dog, underscoring that individual temperament and the nature of the relationship between the two animals both shape whether, and how strongly, grief-like behavior appears.

Owners should also watch their own behavior during this period: the same Milan study found that owner grief and distress levels were correlated with how much behavior change they reported in their surviving dog, suggesting a dog's recovery may be partly influenced by the emotional tone the owner is projecting at home during the same period.