The word “sustainability” doesn’t need any introduction – trying to do more with less is on everybody’s mind. Making that happening, however, is easier said than done. During his many years at R&D with animal nutrition company Nutreco as well as in his role as professor at Wageningen University & Research in the Netherlands, Leo den Hartog never stopped asking how the industry could achieve a better feed efficiency. He is optimistic there are still many things the industry can do to only do a better job in the future.