PURPOSE: To improve the internal circulation of blood of the whole livestock and promote their health, by causing a transfer in the magnetic line of force within the body due to the change of proper relative intervals between the livestock and the magnetic body and producing an effect on the circulation of blood with the internal electric current generated by such transfer in the magnetic line of force.

CONSTITUTION: The mechanism is constituted with livestock 1 and a magnetic body 2, where the magnetic body 2 emits a magnetic line of force which passes into the body of livestock 1. As for such magnetic body 2, a permanent magnet can be used, or a magnetic line of force varying with the lapse of time will also do. Livestock 1 and a magnetic body 2 are placed at proper relative intervals and a transfer in the magnetic line of force is caused within the body of livestock 1 due to the change of said relative intervals. Such change of relative intervals may be caused by, for example, exercise of livestock 1 or movement of the magnetic body 2. Thus, electric current is generated within the body as the result of the transfer in the magnetic line of force in the body and the internal circulation of blood is influenced by such internal electric current and is improved accordingly.