A recent U.S. study utilized a novel sniff test to evaluate dogs' self-recognition abilities, confirming a self-cognition hypothesis first proposed by a leading professor last year. While dogs excel at social cognition and even metacognitive tasks, they have historically failed the traditional mirror self-recognition test. Researchers applied a pioneering ethological approach to 36 dogs tested alongside their owners.
The findings build on prior evidence, demonstrating that dogs differentiate their own scent after habituation—sniffing it longer when an unfamiliar odor is added compared to when it's absent. This pattern strongly suggests they recognize their own smell as uniquely theirs.
Testing a larger, diverse group of dogs—from various living situations, ages, and genders—the sniff test provides compelling evidence of self-awareness. It challenges the notion that this trait is limited to great apes, humans, and a few other species, highlighting how the verification method matters.
