Some puppy foods cater specifically to large breeds to control their rate of growth.
May be "Quality of life"- and here What i'm saying is the dogs life but not the the humans! Some pet owners realise this and in order to purchase a fortified food for their dog ensuring your company age. https://Www.openlearning.com/u/oddershedefinley-swrwy2/blog/ClassicFavoritesFavoriteBrandsForOlderDogDiets