Microchipping companion animals prevents the welfare harms of permanent separation from owners and enables reunion after loss, accident, or theft.
Microchipping provides welfare protection against the permanent loss of a companion animal through separation. A dog who escapes and cannot be reunited with its owner faces shelter stress, rehoming uncertainty, and the loss of all established social bonds and familiar environment. A microchipped dog who escapes and is found can be reunited within hours. The welfare benefit is the prevention of separation welfare costs for both animal and owner. The one requirement that undermines this benefit — outdated registration details — is the most common reason microchipped animals are not reunited. Registration accuracy matters as much as initial chipping.