Why primates in strollers are not actually human babies

Nature · Published 3 October 2026 Swipe more like this →

In short: They wear diapers, ride in strollers, and receive constant care, yet they aren't infants. This practice of raising primates as domestic pets raises a profound ethical question: is this an act of love or a form of cruelty to animals?

The phenomenon of 'monkids' describes the trend of raising non-human primates in human environments. While these animals are often treated with the same nurturing behaviors we provide for human infants—including being carried, fed from bottles, and kept in domestic settings—they remain biologically distinct species. This blurring of lines between pet ownership and parenting creates a complex moral landscape regarding animal welfare.

From an evolutionary and biological standpoint, primates have unique social structures and needs that are often incompatible with a solitary human household. When we treat them as 'babies,' we risk neglecting their natural behaviors and the complex social interactions they require to thrive. The debate centers on whether these domestic lives offer safety or if they constitute a form of confinement that strips away the animal's wild identity.

This distinction is important because it highlights our role as curators of other species. Understanding that an animal is not a 'human baby' despite its proximity to us helps clarify the responsibility we hold. It forces us to consider whether human affection can ever truly substitute for the natural ecological and social roles these primates were designed to fill.

While the provided text focuses on this specific ethical dilemma, it contrasts with other mammalian behaviors, such as those of marsupials. For instance, kangaroos manage their young through specialized biological mechanisms like pouches, where joeys are physically transported and fed by muscle pumps, highlighting how different mammals have evolved unique ways to ensure offspring survival without human intervention.

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