Microchipping companion animals dramatically increases reunion rates for lost pets, reducing the time animals spend in shelters and the euthanasia of unclaimed pets. It is one of the highest welfare-return interventions available.
Microchipping is a minor, brief welfare cost that produces major long-term welfare benefits. Lost pets who are reunited with owners avoid prolonged shelter stress, euthanasia, or life as strays. The reunification rate difference between chipped and unchipped animals is one of the most well-supported welfare statistics in companion animal care. Mandatory microchipping with maintained registries is highly effective.