Canine oral investigation of human pedal extremities is a common behavior observed in domesticated dogs. This action often manifests as repetitive licking of the feet. Several underlying factors contribute to this propensity, ranging from instinctive communication methods to sensory exploration.
The behavior can serve multiple purposes, potentially fulfilling social, gustatory, and even olfactory needs. Dogs possess a highly developed sense of smell and may be detecting subtle chemical compounds present on the skin. In some cases, the licking might be a learned behavior, reinforced by positive interactions or attention from the owner. Historically, similar behaviors have been observed in canine pack dynamics, often associated with deference and social bonding.