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 active dog food is tailored especially to this second period of growth and was developed with the particular needs of young dogs with high activity levels in mind kibble shape 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 dig