Some of these guys have thighs nearly as big as a sewer lid. Hulk Hogan has bone and he has substance. Go to a draft horse pull or an oxen pulling contest. Look at the size of the feet, the bone and the substance of hocks on these professional pulling animals. You will not find anything of a jockey nature.
Many people call fine boned animals bird legged, similar to a chesty bodied bird with tiny legs.
With substance and bone, come some very good things. The ability to lay on thick layers of meat is another. The chicken industry has identified strains of chickens with very large bone and with that, they have developed some gainability factors of the fastest growing efficient fowl in the world. They have developed bone and substance and found it very profitable. His owner asked me to evaluate the herd and as I looked closely at this bull, I realized his hocks were very unsound.