Zero-Grazing Dairy Systems and Welfare

Zero-grazing or indoor-housed dairy systems keep cows permanently inside. Welfare assessment must account for the behavioural and health trade-offs of year-round indoor housing.

Key Facts

Up to 20% of UK dairy cows are now in zero-grazing systems
Advantages include protection from weather, reduced lameness risk, and higher yields
Welfare costs include lack of access to pasture behaviour including grazing and social space
Grass deprivation is a welfare concern for highly motivated grazing behaviour
RSPCA Assured does not certify zero-grazing dairy systems

Welfare Considerations

Zero-grazing systems require careful welfare management to compensate for the removal of pasture access. Grazing is a highly motivated behaviour occupying 8 hours of cows time in outdoor systems. Permanent housing requires outstanding cubicle design, high stocking density management, and feeding systems that allow adequate lying time and social behaviour. Systems that provide outdoor access, even if limited, achieve better welfare outcomes than fully enclosed zero-grazing.

What You Can Do

Choose dairy products from farms with pasture access certification
Ask supermarkets about their dairy sourcing policies on pasture access
Support research into measuring welfare outcomes in zero-grazing systems
Advocate for mandatory pasture access requirements in high-welfare dairy standards