Access to outdoor pasture is strongly associated with positive welfare outcomes in cattle. Zero-grazing systems, while potentially reducing some disease risks, deprive cattle of natural behaviours that are fundamental to their welfare.
Cattle kept permanently indoors are unable to perform normal locomotion, grazing, and environmental exploration. This restriction causes frustration and reduces positive welfare states. Lameness rates are influenced by flooring quality and exercise opportunity. Calves raised indoors without social groups miss critical socialisation that affects their behaviour throughout life. Cows that experience pasture access and are then confined show acute behavioural signs of frustration, demonstrating the subjective importance of outdoor access to individual animals.