How automated grooming brushes support dairy cow welfare, reduce stress, and provide evidence of positive welfare states in commercial dairy settings.
Grooming brushes provide a rare example of a welfare enrichment that is both commercially adopted at scale and genuinely valued by the animals it serves. Dairy cows actively choose to use brushes when provided, spending significant time engaging with them. The behavioral indicators during brush use — relaxed posture, reduced stress vocalizations, extended session duration — are consistent with positive affective states. While brushes alone cannot compensate for broader housing welfare deficiencies, they represent a meaningful positive welfare provision and demonstrate that commercial dairy farming can incorporate positive welfare alongside disease and injury management.