I am trying to get link. Two of the local dog trainers I visit for supplies.(.treats and grain free kibble etc.) Both had article posted..both photocopied..I am thinking it came from a Paper written for vets, as some of the language was medical. I know they said they tested 30+ litters of 7 pups or more long and short haired all in the NE area. AND YES it was large breed puppy formula..not a medical language expert but I got the feeling and or drift that they add stuff to promote growth to take advantage of all the loons who are size addicted..who than tell other loons to buy xyz