The Wagyu rancher does not want his secrets revealed, because diet, breeding, and treatment are major factors in producing the most succulent beef in the world
It is rumored that in Japan, ranchers include beer in the Wagyu cattle diet, as it seems to stimulate hunger (which is necessary in the hot summer months, when appetites decrease). Increased food intake leads to higher fat production and retention, which contributes to the distinctive marbling of the Wagyu beef
Wagyu cattle traditionally receive massages in addition to their special diets and treatment. The massages, are a substitute for the muscle stimulation normally gotten through exercise. The massages relieve stress and stiffness; in this case, the belief is that relaxed, happy cows make better meat.