Bored mink snack between meals, lie awake in bed; Enriching surroundings reduces signs of boredom in caged mink

Exposing mink to a variety of stimuli including puffs of air, objects to chase, and candles, the researchers found that animals housed in homes enriched with other stimuli such as water to wade in consumed fewer food treats when not hungry, and did not lie awake without sleeping as much as animals housed without these stimuli.

Although providing caged animals with sufficiently stimulating environments is considered critical for their well-being, defining what may be considered adequate stimulation has been a challenge. Inactive or sluggish animals are often called bored or depressed, but these terms are yet to be clearly defined for non-human subjects.

The authors of this study suggest that their results are a first step towards defining boredom in caged mink. According to the study, "Such means of defining boredom for non-human animals are very much needed, since reducing boredom is often stated as an aim of enrichment, and yet to date we have had no means of judging success at achieving this goal."

Lead author Meagher adds "Many people believe that farm and zoo animals in empty enclosures get bored, but since the animals can't tell us how they feel, we can only judge this from seeing how motivated they are for stimulation."