Panosteitis is a spontaneously occurring lameness that usually occurs in young large breed dogs, with German Shepherd seeming to be particularly predisposed to this condition. (web-dvm.net)
One of the most common causes of pain in young large breed dogs is hip dysplasia. (petpeoplesplace.com)
Young large breed dogs are at higher risk of developing skeletal problems than small breed dogs, even when both are fed diets with too little or too much calcium. (healthypets.mercola.com)