Microchipping significantly increases the probability of stray or lost animals being reunited with owners; the welfare benefit of preventing extended stray periods and euthanasia is substantial.
Microchipping provides a welfare benefit that extends across the animal's entire life by enabling rapid return if lost. Stray periods expose animals to road traffic, starvation, disease, and predation; the emotional distress of separation from familiar environments and companions is also real. Extended stray periods that end in shelter euthanasia represent preventable welfare harm that a microchip and current registration details can prevent. The welfare case for microchipping is one of the clearest in companion animal care.