Why Does Losing a Pet Hurt So Much? Pet Loss Grief Explained

You still set out two bowls at 7 a.m. Then you remember, and the whole thing lands on you again in a kitchen that suddenly feels too big.

If you're wondering why losing a pet hurts this much, the short answer is that you lost someone you were with every single day. Research on pet loss grief keeps pointing the same way: when the bond is close, the grief is real, and for some people it is as heavy as losing a person.

How deep grief goes tends to follow how close you were. A pet you cared for every day can leave a very large hole, and feeling that hole is a normal response to a real loss.

Why the bond with a pet runs so deep

Many relationships happen in pieces. You see friends on weekends and call family on Sundays. A dog or cat is there for nearly all of it: the alarm going off, the first coffee, the late nights, the sick days on the couch.

That daily care builds a structure into your life. Eric Richman, a clinical social worker at Tufts' Cummings Veterinary Medical Center, explained in a Tufts interview that you feed and walk a pet on a schedule to take good care of them, and without that routine, people feel lost. In his words, "The connection you have with a pet is almost so deep in your soul that it's hard to express. People often feel an emptiness."

Then there's the kind of presence a pet offers. They don't care how your day went at work or what you look like at 6 a.m. A review published in Omega points to the unconditional relationship pets offer, and to studies finding that the stronger the attachment, the deeper the grief after a pet dies.

Most American pet owners already see it this way. In a 2023 Pew Research Center survey, 97% of pet owners said their pets are part of their family, and 51% said their pets are as much a part of the family as a human member.

So when a pet dies, you lose more than an animal. You lose the walk, the weight at the foot of the bed, the face at the window, and the version of your day that had them in it.

What research says about how much pet loss hurts

For a long time, grief over a pet was treated as a smaller thing. The research doesn't support brushing it off.

A 2022 systematic review in the journal Death Studies pulled together 19 qualitative papers on losing a pet. The authors open by noting that people who lose a beloved pet may feel grief and loss "synonymous with the death of a human."

A 2026 study in PLOS One of 975 adults in the United Kingdom went further. Among people who had lost both a pet and a person, 21.0% said the pet's death was the most distressing loss they had been through. That's about 1 in 5.

The same study looked at prolonged grief disorder, where intense grief lasts and gets in the way of daily life. Among people who named a pet's death as their hardest loss, 7.5% met the study's criteria for it. That was the lowest of the losses measured, but close to the rates after the death of a close friend (7.8%), a sibling (8.9%), or a partner (9.1%). The rate after the death of a child (21.3%) was much higher. Current psychiatric manuals only allow this diagnosis after the death of a person, and the author argues the findings challenge that rule. He also notes limits: people were recruited online, and the grief questionnaire had only been tested before with people grieving humans.

Not every study finds pet and human grief equal. A 2016 study of college students found that people grieving a person reported somewhat higher grief than people grieving a pet, though the difference was small. The bigger finding was that for both groups, closeness to the one who died was "overwhelmingly the strongest predictor of grief severity."

Grief tends to follow closeness. If your pet was the one you spent the most ordinary hours with, it makes sense that this loss hits hard, sometimes harder than you expected.

Why pet loss grief can feel so lonely

Part of what makes this hard is how other people react. Grief researcher Kenneth Doka coined the term disenfranchised grief in the late 1980s for grief that "is not or cannot be openly acknowledged, publicly mourned, or socially supported." The Omega review cites Doka's definition and notes that a lack of understanding from society often leaves grieving pet owners in exactly that spot.

Harvard Health Publishing describes what this looks like in real life. There is a lack of formal societal or religious processes for mourning a pet. Friends and family may not acknowledge the depth of the loss ("It's just a dog") or may expect you to replace the pet quickly ("Just get another one").

A review of 48 studies on pet bereavement found that grieving pet owners frequently reported feelings of embarrassment and loneliness. So if you've felt silly for tearing up at your desk, or told a coworker you had a cold instead of saying your cat died, you are in a lot of company.

There's often no service, no stack of cards, no bereavement leave. You may be back at work the next morning, acting as if nothing happened, while the house you go home to is quieter than it has been in years.

How to answer someone who says "it was just a dog"

People who say this often aren't trying to hurt you. They may never have had a pet, or sadness may make them uncomfortable. Either way, you don't owe them an argument. Here are a few things you could say, depending on how much energy you have:

• Short and closed: "She was family to me. I'd rather not talk about it right now."
• Explaining a little: "I took care of him every day for twelve years. It's a big loss for me."
• Setting a boundary: "I know you mean well, but that's hard to hear right now."
• When someone says "just get another one": "Maybe someday. Right now I'm missing this one."
• Asking for what you need: "You don't have to understand it. It would help if you just listened."

You can also choose not to explain at all. Saving your energy for people who get it is a reasonable choice. When the people nearby don't get it, the free hotlines and groups in our pet loss support guide are staffed by people who do. You can also see how other pet parents talk about the animals they miss.

You have permission to grieve this

You don't need to justify how sad you are, or measure it against anyone else's loss. You also don't need to hurry. There's no set number of days after which missing them becomes wrong.

Grief after a pet can show up in a lot of ways. Crying in the car. Skipping the pet food aisle at the store. Leaving the water bowl out longer than you planned. Laughing at an old video and then falling apart. None of that means something is wrong with you, and none of it means you're doing this badly.

Richman's advice is to embrace the grief, even though "it's painful, it doesn't feel good, and sometimes it's hard to even carry on in their daily life." Some people find it helps to say their pet's name out loud, keep parts of the old routine for a while, or write down the small habits they don't want to forget.

If the weight of it ever turns into thoughts of not wanting to be here, you can call or text 988 at any hour. The Suicide & Crisis Lifeline is free and confidential, and you do not have to be suicidal to reach out.

They were part of almost every day you had together. Missing them this much makes sense.

If you are thinking about harming yourself, call or text 988 in the US, any time.