Overview of cattle breeding for welfare-relevant health and longevity traits in dairy systems.
Dairy cattle breeding for welfare requires integrating health, longevity, and functional traits alongside production. Mastitis resistance, fertility, and feet and legs scores are welfare-relevant traits now included in leading breeding indices. Genomic selection is accelerating progress. Crossbreeding for hybrid vigour offers welfare benefits through improved disease resistance and reproductive performance. The genetic diversity challenge requires both crossbreeding strategies and conservation of diverse breed genetics.