A system for treating an animal including: a housing; at least one magnetic module contained within the housing. Each magnetic module includes: a ferromagnetic housing; having a non ferromagnetic segment forming an aperture; a wound magnetic wire coil on a perforated spindle having a coil diameter greater than a coil depth surrounding the aperture and located between the non-ferromagnetic segment and the ferromagnetic housing. The wound magnetic wire coil generates a constant amplitude electromagnetic field within the aperture when coupled to a direct electrical current. Each aperture is sized to receive at least one limb of an animal.