Effect of feed particle size in pelleted diets on growth performance and digestibility of weaning piglets

•The particle size of the pelleted feed is evaluated in the nursery phase.•The older the animal at nursery the better its performance when fed coarser feed.•In the pre-initial phase, pelleting diets with a geometric mean diameter (GMD) of 534 µm improves performance.•In the initial phase, pelleting diets with a GMD of 943 µm improves performance.•In the initial phase, piglets receiving pellet diets with the finest GMD (587 µm) showed better feed efficiency utilization.