Laboratory dogs in enriched colony housing experience dramatically better welfare than those in traditional single-housing systems.
Dogs are highly social animals for whom isolation causes significant psychological harm. Laboratory dogs in single housing without social contact, exercise, or enrichment develop anxiety disorders, stereotypic behaviors, and fearfulness that affect both their welfare and the validity of behavioral research. The 3Rs principle of Refinement requires improving animal welfare in research settings, and the evidence for benefits of social housing is compelling. Institutions that maintain dogs in traditional single housing without scientific justification are failing both welfare and scientific standards. The transition to social housing and enriched environments represents one of the most impactful welfare improvements available for laboratory dogs.