Puppies of giant dog breeds grow in two stages with muscle growth occurring mainly in the second phase from 8 to 1824 months of age royal canin giant junior dog food is tailored especially to this period of growth the shape size and consistency of the junior kibble encourage intensive chewing and may thus slow down food intake they also promote tooth and mouth hygiene prebiotics such as dried beet shavings and fructo and mannan oligosaccharides foster a balanced gut flora psyllium support