Do pets form friendships with each other
Yes, pets form friendships, but the bond depends on species, domestication, and shared benefits like protection or play rather than just cohabitation.
Yes, pets form friendships, but the bond depends on species, domestication, and shared benefits like protection or play rather than just cohabitation. These interspecies friendships are nonsexual bonds where each animal benefits from the other, ranging from dogs and cats sleeping together to unlikely alliances between predators and prey.
Domestication drives the most common bonds
The most frequent friendships occur between domesticated animals that would never naturally coexist, such as a dog and a cat in the same household. This is a result of domestication, a multi-generational process where humans influence the reproduction and care of other species, allowing them to learn to coexist. In these settings, animals often display companionship through play, sleeping together, and grooming, effectively treating each other as family members.
Communication bridges species gaps
Friendships form when animals can communicate, whether verbally or non-verbally, to establish mutualism and trust. Dogs and cats, for instance, often learn to understand each other's body language, with dogs sometimes acquiring cat-like behaviors like mutual nose sniffing to greet one another. In the wild, similar communication facilitates survival; West African Diana monkeys and Campbell's monkeys, for example, understand each other's alarm calls to provide mutual protection against danger.
Mutualism creates lasting alliances
Many interspecies friendships are rooted in mutualism, where both parties gain a tangible benefit from the interaction. A classic example involves coyotes and badgers, which can form a cooperative hunting partnership for ground squirrels. The badgers dig into the nests while the coyotes catch the escaping squirrels, and after the hunt, they rest together in close proximity. This functional cooperation often evolves into a social bond where the animals seek each other out for safety and companionship.
Protection fosters deep attachment
Protective behavior is a powerful catalyst for friendship, often leading to interspecies adoptions where one animal assumes a guardian role. Documented cases include a ram protecting a blind cow and a steer shielding a blind mule from obstacles and injuries. These bonds are so strong that the protector continues to exhibit the same care for the offspring of the protected animal, such as a ram guarding a newborn calf. This dynamic mirrors the human-animal bond, where a pet often views its owner as a protector and caretaker.
Play signals a genuine social bond
Play is a fundamental form of communication that signals a mutual understanding of pleasurable interaction, distinguishing friendship from mere tolerance. When a timber wolf and goats race along a fence or a horse allows a wild turkey to climb on its back, they are engaging in social bonding that requires recognizing the other as a companion. This play behavior is often seen in domesticated settings, where dogs and humans engage in complex games that require synchronized actions and mutual understanding.
Unlikely pairs defy natural instincts
The existence of interspecies friendships challenges the idea that animals only associate with their own kind or natural prey. There are numerous documented instances of animals forming bonds across vast evolutionary divides, such as a narwhal traveling with a group of beluga whales or an ocelot prowling in tandem with an opossum. Even in cases where one species typically preys on another, like gray whales and humans, the animals can display gentle, friendly behavior, suggesting that the capacity for friendship transcends natural predatory instincts.
Human influence accelerates social integration
Humans play a significant role in facilitating these friendships, often by selecting for "human-like" social traits in domesticated animals. Dogs, for example, have evolved specific social skills like lifelong attachment and reduced aggression, making them uniquely suited to form bonds with humans and other species. This selection has allowed dogs to become one of the most successful mammalian species, integrating into human communities and forming relationships that mimic parent-child dynamics. The result is a world where animals of different species can share nests, sleep together, and even mourn each other, proving that friendship is a biological reality, not just a human projection.