European broiler farming primarily relies on fast-growing genotypes raised in standard and confined systems. While economically advantageous, this farming model raises concerns regarding animal health and welfare. It is now recognized that rapid growth negatively affects broiler mobility and can lead to an increased prevalence of lameness due to accelerated ossification, as well as a higher incidence of footpad dermatitis. One of the top challenges for breeders  is  therefore  to  reconcile  economic performance with animal welfare. Breeders have been addressing this issue for several years through various strategies aimed at improving the robustness of the strains they offer. Robustness can be defined by  a  strain’s  resistance  and  resilience  abilities (overall ability to recover from stress/infection, …)