Why cows love to brush

Natural grooming behaviour explained

  • Cow brush
May 47:10 AM

For dairy cows, grooming is far more than a luxury, it is an essential behaviour linked to comfort, welfare and emotional balance. Many farmers are surprised to learn how strongly cows are motivated to scratch and brush themselves. In fact, controlled experiments have shown that cows will work just as hard to access a mechanical brush as they do to access fresh feed, underlining how important grooming is to them as a natural need.

Cows experience itchiness, loose hair, parasites, dust, sweat build‑up and general irritation on different parts of the body throughout the day. Their instinct is to rub against trees, posts or rough surfaces. However, in modern barns these natural scratching objects are often unavailable. This makes a mechanical cow brush a powerful enrichment tool, one that allows cows to express natural grooming behaviour that would otherwise be restricted.

Which body areas do cows prefer to brush, and how do they use cow brushes?

High‑quality behavioural research shows that cows mostly brush areas they cannot easily reach themselves:

  • Head
  • Neck
  • Back
  • Tail base

They brush these areas with remarkable enthusiasm. When given the opportunity, cows spend around 7 minutes per day brushing themselves on a mechanical brush[i].

Interestingly, researchers have also found that cows brush with determination: pushing their full bodyweight against the brush to achieve a firm, satisfying scratch, much harder than gentle grooming by a human hand. This means that a barn brush must be sturdy, resilient and designed for heavy pressure.

Why brushing matters for welfare

Grooming improves wellbeing, reduces impatience, and supports a healthy skin condition. Brushing also stimulates blood circulation, reduces itchy skin and helps cows relax. Reduced stress is strongly linked to better immunity and herd health, and studies show a clear connection between enriched environments and improved physical outcomes such as lower mastitis levels and increased milk production[i].

From natural behaviour to smart barn equipment

Allowing cows to groom is therefore not a luxury, it is essential for healthy and content animals. But to provide this reliably indoors, farmers need a robust brush that mimics natural scratching surfaces while ensuring safety and hygiene.
This brings us to the Lely Luna: a fully electric cow brush designed specifically to support natural grooming behaviour, allow cows to scratch firmly and safely, and deliver comfort where cows need it most. 

Source: 

[i] Environmental Enrichment for Dairy Cattle: Hair Brushing

Disclaimer: Not all results have been verified by Lely. Actual results may vary, and no rights can be derived from the information in this article.

Other Farming Insights