International audience; This study aimed to assess the influence of feed composition at the onset of solid feed intake, at 18 to 28 d of age, on growth performance and health in young rabbits until slaughter age (70 d). 796 rabbit kits, issued from 64 does followed during two successive reproduction cycles, were divided into 2 experimental groups differing in the diet that the suckling rabbits received from 18 to 28 d of age. From 18-28 d, young rabbits in the RF group were fed a diet that met the needs of reproductive does (R; 10.57 MJ DE/Kg, 128 g DP/lcg, 199 g DF/kg), while young rabbits in the FF group were fed a diet that met the needs of growing rabbits (F; 9.35 MJ DE/1