Q. Wagyu is a breed of cattle that originated in Japan. As part of their daily diet, Wagyu cattle are fed beer to stimulate their appetite. Is Wagyu Beef Halaal to eat if it is slaughtered in a Halaal way?
A. As a general principle, it is not permissible to feed Haraam substances to an animal. If Haraam substances, like wine etc. forms part of the main diet of a Halaal animal and thereafter, it had been slaughtered in a Halaal way, it will be impermissible to consume the meat of such an animal. The main diet of the Halaal animal will have to be altered or changed a few days before it is slaughtered for its Halaal consumption.
In the enquired case, the same would apply to Wagyu beef.
Allah Ta’ala Knows Best
Mufti Ismaeel Bassa