Animals used in research have welfare needs that extend beyond basic physical health. Environmental enrichment programs can significantly improve their psychological wellbeing while maintaining scientific validity.
Laboratory animals live in environments designed primarily for experimental control, not animal welfare. Standard laboratory caging often fails to meet the behavioral needs of the animals housed within it - mice cannot burrow, rats cannot climb, rabbits cannot run and jump. Stereotypic behaviors in laboratory animals (repetitive wire-gnawing, bar-chewing, running patterns) indicate frustrated behavioral needs and psychological suffering. The scientific community has increasingly recognized that enrichment is not just ethically required but scientifically beneficial - stressed animals with elevated cortisol are poor models for most conditions being studied. Investment in enrichment is both an ethical and scientific imperative.