Mount And Blad Key My 6month Pure Breed Rottweiler Puppy Has A Cist Looking Thing In Th Center Of His Back Near His Shoulder Blad?

My 6month pure breed rottweiler puppy has a cist looking thing in th center of his back near his shoulder blad? - mount and blad key

is the shape of a Valcon CRATOR looking for something. My dog loves more than to lick and then hang the dog. What could this be and how I should handle this.

nick