Why does it hurt so much when a pet dies? Numbers from one survey show how deep the tie runs. In an April 2023 Pew Research Center survey of U.S. adults, 97% of pet owners said their pets are part of their family, and about half of pet owners (51%) said their pet is as much a part of their family as a human member. Women, urban owners and lower-income owners were more likely to say so. Cornell's College of Veterinary Medicine says a pet's death or illness is naturally a source of substantial grief and sadness, because pets offer love, companionship, joy and comfort.

Part of the tie may be physical. In an NIH-funded study, children had higher oxytocin when they played with their family dog than when they played alone with toys, and the dogs' oxytocin also went up. Oxytocin is a hormone made in the brain that is linked to social behavior and bonding. A pet that has been in the house for years is a daily source of comfort, which is why its absence is felt so strongly. Small dog breeds average 10 to 15 years, as of November 2026, and some live as long as 18 years.

Death itself is plain. When a pet dies, its body stops working and does not start again. A pet that has died cannot see, hear or feel anymore, and it does not need to eat or drink. The loss of a pet may be a child's first experience with death, and children understand death differently from adults. Cornell's vet college says adults should welcome children into the conversation, be honest, and let them ask questions. Children may blame themselves, their parents or the vet for not saving the pet, so they need to hear that it was not their fault.

Grief about a pet has a pattern, though not a tidy one. Feelings of grief may not be there all the time, and powerful feelings can appear unexpectedly. They usually become less strong with time. Replaying a pet's last days over and over is common, and the Humane Society suggests focusing on the life shared and favorite memories. It also says holding in sadness can make grief last longer. Many people feel the same sorrow after losing a pet as after losing a person, but others may not recognize it.

Tears are part of the story. People make three kinds of tears: basal tears that keep the eye moist, reflex tears that wash out smoke or onion fumes, and emotional tears that come with strong feelings. A Scientific American feature said other animals may whimper, moan and wail, but none sheds tears of emotion, not even apes. Scientists still do not fully agree on why people cry tears of emotion. It may never be known whether animals feel the loss of other animals the way people do, but they do respond to the absence of a companion in what they do.

People have mourned pets in public for well over a century. London's Hyde Park has a small pet cemetery in the garden behind Victoria Lodge, where Victorians buried their pets. A Maltese terrier named Cherry was the first dog buried there. The cemetery was started by the gatekeeper, Mr. Winbridge, and in 1893 The Strand Magazine published his account of how word of it passed from one pet owner to another. As of October 2023, more than 1,000 dogs and cats were buried there.

The headstones show how much these animals mattered. One Hyde Park headstone reads "Poor dear Tappy." Another remembers a dog named Topsy as "the faithful friend" of a family for over 15 years. For a dog named Zoe, the stone says she was "As deeply mourned as ever dog was mourned." After Zoe died in 1892, her owner wrote a funny make-believe life story of Zoe to comfort his family.

In 1896, a New York vet let a woman bury her dog in his apple orchard. That became Hartsdale Pet Cemetery. It holds more than dogs and cats: a lion cub was buried there in 1912, and there are headstones for reptiles, mice, monkeys, a horse and birds. As of November 2026, tens of thousands of pets are buried there. Inscriptions include "A truer friend we never had." Hartsdale was added to the National Register of Historic Places in 2012, and a war dog memorial there, set up in 1923, honored World War I service dogs.

Today people have many ways to remember a pet. A pet's family can write an obituary, a short story about the pet's life. Memorial ideas include a clay paw print made by the vet, a keepsake tag on a keychain, and flowers that bloom every year. Volunteering for an animal welfare group can bring comfort after a pet's death. To help a grieving friend who may not have the energy, offer to do shopping or chores. Sitting quietly with a friend who is crying can help, because you do not have to say something to make them feel better.

You do not have to carry this alone. Children can talk about their feelings with a grown-up, and grown-ups should listen. A parent, a teacher or another grown-up you trust is a good person to start with. As of November 2026, vet schools such as Cornell and Tufts run pet loss support phone lines for people who lost a pet. People and families believe different things about what comes after death, so ask yours. Across more than a century of headstones and surveys, one thing stays the same: people who love an animal grieve when it dies.

Words to know

• oxytocin: bonding hormone
• grief: deep sadness
• cemetery: burying place
• obituary: short life story
• Victorians: people of 1800s