Monkey friendships with dogs, deer and even pigs offer clues to the evolutionary origins of pet-keeping

Recent field observations identify a behavioral phenomenon where monkeys form social bonds with other species, including squirrels, pigs, deer, and dogs. Scientists are now analyzing these interactions to determine if the impulses driving these interspecies friendships are precursors to the human tendency to keep pets.

Phys.org, IFLScience, and The Times note that these documented social exchanges offer potential clues into the origins of companionship across species lines. Coverage from Popular Science and Defector explores the conceptual question of whether such animal-to-animal relationships can be classified as pet-keeping or if they represent a distinct form of social bonding.

Research continues to focus on whether these specific interspecies behaviors correlate with cognitive traits necessary for long-term domestic animal maintenance. As the inquiry progresses, observers are waiting for additional data regarding the frequency and duration of these bonds to see if they hold consistent evolutionary significance.