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How PawSeniors Researches This
PawSeniors articles are written and edited in-house, then checked against primary veterinary sources before publishing.
- Every medical claim is sourced to the American Kennel Club, PetMD, VCA Animal Hospitals, or another named veterinary source, linked at the end of the article.
- Every claim is tied to a named, checkable veterinary source linked at the end of the article — nothing is published without a reference you can verify yourself.
- Articles are updated when veterinary guidance changes.
When a household loses one pet, it’s easy to focus entirely on the grieving humans and overlook that the surviving animal is often grieving too. According to PetMD, a study found that 66% of dogs and 65% of cats showed four or more behavioral changes after the loss of a companion animal in the household — patterns strongly suggestive of grief, even if pets don’t understand death the way people do.
What Grief Looks Like in Pets
- Lethargy and reduced activity
- Decreased appetite
- Lingering near the deceased animal’s bed or favorite resting spot
- Changes in vocal patterns — more or less vocal than usual (seen in around 63% of dogs in the cited study)
- Increased clinginess or affection toward their owner
These signs can look a lot like signs of illness or cognitive decline, which is worth keeping in mind — if changes persist for more than a few weeks or seem severe, it’s still worth a vet visit rather than assuming grief explains everything.
How Long Grief Usually Lasts
Most surviving pets show noticeable changes for somewhere between a few days and a few weeks, with gradual improvement as a new routine settles in. There’s real variation between individual animals, and factors like how closely bonded the two pets were and how much the household routine has changed both play a role. A pattern that’s still just as intense after a month or two, rather than easing, is the point where it’s worth ruling out something else going on rather than continuing to wait it out.
Why It’s Harder to Read in a Senior Pet
In an older dog or cat, grief-related lethargy, appetite changes, and withdrawal can look nearly identical to the early signs of age-related conditions like cognitive decline, arthritis pain, or organ disease — conditions that are already more likely to be developing around the same time in a pet’s life. That overlap cuts both ways: it’s easy to blame grief for something that’s actually a new medical issue, and just as easy to over-medicalize normal grieving. Timing the vet visit to a few weeks out, rather than immediately or not at all, gives grief a fair chance to resolve on its own while still catching something that isn’t grief.
What Actually Helps
- Keep the schedule steady. Consistent mealtimes, walks, and playtime give a grieving pet a stable structure while everything else feels different.
- Add a bit of extra attention. More affection, play, and one-on-one time supports a surviving pet through the adjustment — and often helps the grieving owner too.
- Don’t rush to get a new pet. If your remaining pet is now the only animal in the house, it might seem like a new companion would fix the loneliness. In most cases, that’s not the right move immediately — a grieving pet may not be ready for a new relationship, and introducing one too soon can add stress rather than comfort.
- Watch for prolonged changes. A dip in appetite or energy for a week or two is common; if it continues much longer or worsens, loop in your vet.
The Bottom Line
A surviving pet’s grief is real, even if it looks different from human grief, and it deserves the same patience you’d extend to a person going through loss. Time, routine, and a little extra attention do most of the work — forcing a quick fix, like a new pet, usually doesn’t. And in a senior pet, giving it a few weeks before assuming grief explains everything is what keeps a real medical issue from hiding behind an emotional one.
Sources: PetMD — Do Dogs and Cats Grieve?, VCA Animal Hospitals — Helping Your Grieving Pet.
Photo: “A lovely couple with two dogs” by freestocks.org, marked with CC0 1.0.
