Replacement heifer Demo: Feed efficiency and hybrid vigour score.
Feed efficiency is an important determinant for long term sustainability of beef production. Residual feed intake is a good measure of feed efficiency as it is independent of growth, body weight and body composition and reflects the energy cost of maintenance. Hybrid vigour or heterosis is also an important determinant of sustainability as it is highly related to fertility, longevity, health resilience and a lower carbon footprint. Together these two factors are important considerations when selecting replacement heifers.