Environmental enrichment for laboratory animals reduces stress, improves scientific validity of results, and promotes positive welfare. Implementation guidance has expanded significantly with growing evidence for species-specific benefits.
Laboratory animal enrichment has moved from optional enhancement to ethical requirement and scientific best practice. Enriched animals are less stressed, have more robust immune systems, and produce more representative experimental results — making enrichment both an animal welfare imperative and a scientific quality improvement. The scientific case for enrichment provides a compelling argument to researchers primarily motivated by data quality. Enrichment programs must be species-specific and scientifically validated; generic approaches may fail to address the most significant behavioral needs of each species.