Wagyū Beef

It's not true that Wagyū cattle are specially treated, massaged and given sake or beer mash during breeding.

An excerpt from the article 15 facts about Wagyū beef

To this day, Japanese breeders smile at the fact that this myth is spread around the world. Above all, good genes, the right weather conditions and food are needed to achieve spectacular breeding results.

However, the story may be partially true, as cattle are regularly brushed, which is probably where the cow massage rumor originated.